97172570827 has 4 divisors (see below), whose sum is σ = 102286916680. Its totient is φ = 92058224976.

The previous prime is 97172570797. The next prime is 97172570851. The reversal of 97172570827 is 72807527179.

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

It is a cyclic number.

It is not a de Polignac number, because 97172570827 - 2¹⁹ = 97172046539 is a prime.

It is a super-2 number, since 2×97172570827² (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 (97172570867) 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, 2557172898 + ... + 2557172935.

It is an arithmetic number, because the mean of its divisors is an integer number (25571729170).

Almost surely, 2^97172570827 is an apocalyptic number.

97172570827 is a deficient number, since it is larger than the sum of its proper divisors (5114345853).

97172570827 is a wasteful number, since it uses less digits than its factorization.

97172570827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114345852.

The product of its (nonzero) digits is 3457440, while the sum is 55.

The spelling of 97172570827 in words is "ninety-seven billion, one hundred seventy-two million, five hundred seventy thousand, eight hundred twenty-seven".