997608725 has 6 divisors (see below), whose sum is σ = 1237034850. Its totient is φ = 798086960.

The previous prime is 997608719. The next prime is 997608767. The reversal of 997608725 is 527806799.

It can be written as a sum of positive squares in 3 ways, for example, as 278189041 + 719419684 = 16679^2 + 26822^2 .

It is not a de Polignac number, because 997608725 - 2¹⁰ = 997607701 is a prime.

It is a super-2 number, since 2×997608725² = 1990446336392251250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19952150 + ... + 19952199.

It is an arithmetic number, because the mean of its divisors is an integer number (206172475).

Almost surely, 2^997608725 is an apocalyptic number.

It is an amenable number.

997608725 is a deficient number, since it is larger than the sum of its proper divisors (239426125).

997608725 is a wasteful number, since it uses less digits than its factorization.

997608725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39904359 (or 39904354 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 997608725 is about 31584.9445939042. The cubic root of 997608725 is about 999.2022721328.

The spelling of 997608725 in words is "nine hundred ninety-seven million, six hundred eight thousand, seven hundred twenty-five".