997622503 has 2 divisors, whose sum is σ = 997622504. Its totient is φ = 997622502.

The previous prime is 997622477. The next prime is 997622519. The reversal of 997622503 is 305226799.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997622503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997622503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997622803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498811251 + 498811252.

It is an arithmetic number, because the mean of its divisors is an integer number (498811252).

Almost surely, 2^997622503 is an apocalyptic number.

997622503 is a deficient number, since it is larger than the sum of its proper divisors (1).

997622503 is an equidigital number, since it uses as much as digits as its factorization.

997622503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 997622503 is about 31585.1627033960. The cubic root of 997622503 is about 999.2068721145.

The spelling of 997622503 in words is "nine hundred ninety-seven million, six hundred twenty-two thousand, five hundred three".