997150889503 has 4 divisors (see below), whose sum is σ = 997153007800. Its totient is φ = 997148771208.

The previous prime is 997150889429. The next prime is 997150889533. The reversal of 997150889503 is 305988051799.

997150889503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

997150889503 is a nontrivial binomial coefficient, being equal to C(1412198, 2).

It is a semiprime because it is the product of two primes.

It is a 3-Lehmer number, since φ(997150889503) divides (997150889503-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997150889503 is a prime.

It is a deceptive number, since it divides R_997150889502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997150889533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 1412197.

It is an arithmetic number, because the mean of its divisors is an integer number (249288251950).

Almost surely, 2^997150889503 is an apocalyptic number.

997150889503 is the 1412197-th triangular number and also the 706099-th hexagonal number.

997150889503 is the 470733-rd centered nonagonal number.

997150889503 is a deficient number, since it is larger than the sum of its proper divisors (2118297).

997150889503 is a wasteful number, since it uses less digits than its factorization.

997150889503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118296.

The product of its (nonzero) digits is 24494400, while the sum is 64.

It can be divided in two parts, 997150 and 889503, that added together give a triangular number (1886653 = T₁₉₄₂).

The spelling of 997150889503 in words is "nine hundred ninety-seven billion, one hundred fifty million, eight hundred eighty-nine thousand, five hundred three".