97909013 has 2 divisors, whose sum is σ = 97909014. Its totient is φ = 97909012.

The previous prime is 97909003. The next prime is 97909027. The reversal of 97909013 is 31090979.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64995844 + 32913169 = 8062^2 + 5737^2 .

It is a cyclic number.

It is not a de Polignac number, because 97909013 - 2⁴ = 97908997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97909003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48954506 + 48954507.

It is an arithmetic number, because the mean of its divisors is an integer number (48954507).

Almost surely, 2^97909013 is an apocalyptic number.

It is an amenable number.

97909013 is a deficient number, since it is larger than the sum of its proper divisors (1).

97909013 is an equidigital number, since it uses as much as digits as its factorization.

97909013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 97909013 is about 9894.8983319689. The cubic root of 97909013 is about 460.9009014312.

The spelling of 97909013 in words is "ninety-seven million, nine hundred nine thousand, thirteen".