538156997 has 12 divisors (see below), whose sum is σ = 629687520. Its totient is φ = 450539208.

The previous prime is 538156943. The next prime is 538157027. The reversal of 538156997 is 799651835.

It is not a de Polignac number, because 538156997 - 2⁶ = 538156933 is a prime.

It is a super-2 number, since 2×538156997² = 579225906840116018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538156397) 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, 7847 + ... + 33732.

It is an arithmetic number, because the mean of its divisors is an integer number (52473960).

Almost surely, 2^538156997 is an apocalyptic number.

It is an amenable number.

538156997 is a deficient number, since it is larger than the sum of its proper divisors (91530523).

538156997 is an equidigital number, since it uses as much as digits as its factorization.

538156997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41672 (or 41629 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 53.

The square root of 538156997 is about 23198.2110732703. The cubic root of 538156997 is about 813.3978068385.

The spelling of 538156997 in words is "five hundred thirty-eight million, one hundred fifty-six thousand, nine hundred ninety-seven".