997763999 has 8 divisors (see below), whose sum is σ = 1010401392. Its totient is φ = 985141440.

The previous prime is 997763993. The next prime is 997764011. The reversal of 997763999 is 999367799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997763999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997763993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202829 + ... + 207689.

It is an arithmetic number, because the mean of its divisors is an integer number (126300174).

Almost surely, 2^997763999 is an apocalyptic number.

997763999 is a deficient number, since it is larger than the sum of its proper divisors (12637393).

997763999 is a wasteful number, since it uses less digits than its factorization.

997763999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7417.

The product of its digits is 52081218, while the sum is 68.

The square root of 997763999 is about 31587.4025364543. The cubic root of 997763999 is about 999.2541101199.

The spelling of 997763999 in words is "nine hundred ninety-seven million, seven hundred sixty-three thousand, nine hundred ninety-nine".