97885471913 has 2 divisors, whose sum is σ = 97885471914. Its totient is φ = 97885471912.

The previous prime is 97885471903. The next prime is 97885471919. The reversal of 97885471913 is 31917458879.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71488321129 + 26397150784 = 267373^2 + 162472^2 .

It is a cyclic number.

It is not a de Polignac number, because 97885471913 - 2⁴ = 97885471897 is a prime.

It is a super-2 number, since 2×97885471913² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97885471919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48942735956 + 48942735957.

It is an arithmetic number, because the mean of its divisors is an integer number (48942735957).

Almost surely, 2^97885471913 is an apocalyptic number.

It is an amenable number.

97885471913 is a deficient number, since it is larger than the sum of its proper divisors (1).

97885471913 is an equidigital number, since it uses as much as digits as its factorization.

97885471913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 62.

The spelling of 97885471913 in words is "ninety-seven billion, eight hundred eighty-five million, four hundred seventy-one thousand, nine hundred thirteen".