97491013 has 2 divisors, whose sum is σ = 97491014. Its totient is φ = 97491012.

The previous prime is 97490969. The next prime is 97491029. The reversal of 97491013 is 31019479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97476129 + 14884 = 9873^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 97491013 - 2¹³ = 97482821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97491013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97491913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48745506 + 48745507.

It is an arithmetic number, because the mean of its divisors is an integer number (48745507).

Almost surely, 2^97491013 is an apocalyptic number.

It is an amenable number.

97491013 is a deficient number, since it is larger than the sum of its proper divisors (1).

97491013 is an equidigital number, since it uses as much as digits as its factorization.

97491013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 97491013 is about 9873.7537441441. The cubic root of 97491013 is about 460.2440623563.

The spelling of 97491013 in words is "ninety-seven million, four hundred ninety-one thousand, thirteen".