997126587 has 12 divisors (see below), whose sum is σ = 1447759144. Its totient is φ = 661305600.

The previous prime is 997126561. The next prime is 997126589. The reversal of 997126587 is 785621799.

It is not a de Polignac number, because 997126587 - 2⁸ = 997126331 is a prime.

It is a super-2 number, since 2×997126587² = 1988522861004537138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997126589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285289 + ... + 288762.

Almost surely, 2^997126587 is an apocalyptic number.

997126587 is a deficient number, since it is larger than the sum of its proper divisors (450632557).

997126587 is a wasteful number, since it uses less digits than its factorization.

997126587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574250 (or 574247 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 997126587 is about 31577.3112693275. The cubic root of 997126587 is about 999.0412768102.

The spelling of 997126587 in words is "nine hundred ninety-seven million, one hundred twenty-six thousand, five hundred eighty-seven".