97881013 has 2 divisors, whose sum is σ = 97881014. Its totient is φ = 97881012.

The previous prime is 97880977. The next prime is 97881071. The reversal of 97881013 is 31018879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87272964 + 10608049 = 9342^2 + 3257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97881013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97881713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48940506 + 48940507.

It is an arithmetic number, because the mean of its divisors is an integer number (48940507).

Almost surely, 2^97881013 is an apocalyptic number.

It is an amenable number.

97881013 is a deficient number, since it is larger than the sum of its proper divisors (1).

97881013 is an equidigital number, since it uses as much as digits as its factorization.

97881013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 97881013 is about 9893.4833602731. The cubic root of 97881013 is about 460.8569611263.

It can be divided in two parts, 9788 and 1013, that added together give a palindrome (10801).

The spelling of 97881013 in words is "ninety-seven million, eight hundred eighty-one thousand, thirteen".