997635250 has 16 divisors (see below), whose sum is σ = 1867573656. Its totient is φ = 399054000.

The previous prime is 997635241. The next prime is 997635283. The reversal of 997635250 is 52536799.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 79727041 + 917908209 = 8929^2 + 30297^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 997635250.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1995021 + ... + 1995520.

Almost surely, 2^997635250 is an apocalyptic number.

997635250 is a deficient number, since it is larger than the sum of its proper divisors (869938406).

997635250 is a wasteful number, since it uses less digits than its factorization.

997635250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990558 (or 3990548 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 46.

The square root of 997635250 is about 31585.3644905358. The cubic root of 997635250 is about 999.2111278444.

The spelling of 997635250 in words is "nine hundred ninety-seven million, six hundred thirty-five thousand, two hundred fifty".