997997235 has 16 divisors (see below), whose sum is σ = 1618671264. Its totient is φ = 524973312.

The previous prime is 997997197. The next prime is 997997237. The reversal of 997997235 is 532799799.

It is not a de Polignac number, because 997997235 - 2⁹ = 997996723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997997237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454612 + ... + 456801.

It is an arithmetic number, because the mean of its divisors is an integer number (101166954).

Almost surely, 2^997997235 is an apocalyptic number.

997997235 is a deficient number, since it is larger than the sum of its proper divisors (620674029).

997997235 is a wasteful number, since it uses less digits than its factorization.

997997235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911494.

The product of its digits is 9644670, while the sum is 60.

The square root of 997997235 is about 31591.0942355595. The cubic root of 997997235 is about 999.3319654959.

The spelling of 997997235 in words is "nine hundred ninety-seven million, nine hundred ninety-seven thousand, two hundred thirty-five".