97427009689 has 27 divisors (see below), whose sum is σ = 104708138367. Its totient is φ = 90643423200.

The previous prime is 97427009677. The next prime is 97427009699. The reversal of 97427009689 is 98690072479.

The square root of 97427009689 is 312133.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4694579289 + 92732430400 = 68517^2 + 304520^2 .

It is not a de Polignac number, because 97427009689 - 2⁹ = 97427009177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97427009699) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 294341254 + ... + 294341584.

Almost surely, 2^97427009689 is an apocalyptic number.

97427009689 is the 312133-rd square number.

97427009689 is the 156067-th centered octagonal number.

It is an amenable number.

97427009689 is a deficient number, since it is larger than the sum of its proper divisors (7281128678).

97427009689 is an frugal number, since it uses more digits than its factorization.

97427009689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 97427009689 in words is "ninety-seven billion, four hundred twenty-seven million, nine thousand, six hundred eighty-nine".