97857575427 has 4 divisors (see below), whose sum is σ = 130476767240. Its totient is φ = 65238383616.

The previous prime is 97857575419. The next prime is 97857575477. The reversal of 97857575427 is 72457575879.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 97857575427 - 2³ = 97857575419 is a prime.

It is a super-2 number, since 2×97857575427² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97857575477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16309595902 + ... + 16309595907.

It is an arithmetic number, because the mean of its divisors is an integer number (32619191810).

Almost surely, 2^97857575427 is an apocalyptic number.

97857575427 is a deficient number, since it is larger than the sum of its proper divisors (32619191813).

97857575427 is a wasteful number, since it uses less digits than its factorization.

97857575427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32619191812.

The product of its digits is 172872000, while the sum is 66.

The spelling of 97857575427 in words is "ninety-seven billion, eight hundred fifty-seven million, five hundred seventy-five thousand, four hundred twenty-seven".