97897079837 has 2 divisors, whose sum is σ = 97897079838. Its totient is φ = 97897079836.

The previous prime is 97897079831. The next prime is 97897079879. The reversal of 97897079837 is 73897079879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78393840121 + 19503239716 = 279989^2 + 139654^2 .

It is a cyclic number.

It is not a de Polignac number, because 97897079837 - 2²² = 97892885533 is a prime.

It is a super-2 number, since 2×97897079837² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97897079831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48948539918 + 48948539919.

It is an arithmetic number, because the mean of its divisors is an integer number (48948539919).

Almost surely, 2^97897079837 is an apocalyptic number.

It is an amenable number.

97897079837 is a deficient number, since it is larger than the sum of its proper divisors (1).

97897079837 is an equidigital number, since it uses as much as digits as its factorization.

97897079837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336063168, while the sum is 74.

The spelling of 97897079837 in words is "ninety-seven billion, eight hundred ninety-seven million, seventy-nine thousand, eight hundred thirty-seven".