997156735 has 8 divisors (see below), whose sum is σ = 1237849920. Its totient is φ = 770217504.

The previous prime is 997156733. The next prime is 997156753. The reversal of 997156735 is 537651799.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 997156735 - 2¹ = 997156733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997156733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3438327 + ... + 3438616.

It is an arithmetic number, because the mean of its divisors is an integer number (154731240).

Almost surely, 2^997156735 is an apocalyptic number.

997156735 is a deficient number, since it is larger than the sum of its proper divisors (240693185).

997156735 is a wasteful number, since it uses less digits than its factorization.

997156735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876977.

The product of its digits is 1786050, while the sum is 52.

The square root of 997156735 is about 31577.7886337850. The cubic root of 997156735 is about 999.0513453389.

The spelling of 997156735 in words is "nine hundred ninety-seven million, one hundred fifty-six thousand, seven hundred thirty-five".