97744513 has 2 divisors, whose sum is σ = 97744514. Its totient is φ = 97744512.

The previous prime is 97744511. The next prime is 97744573. The reversal of 97744513 is 31544779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90193009 + 7551504 = 9497^2 + 2748^2 .

It is a cyclic number.

It is not a de Polignac number, because 97744513 - 2¹ = 97744511 is a prime.

Together with 97744511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (97744511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48872256 + 48872257.

It is an arithmetic number, because the mean of its divisors is an integer number (48872257).

Almost surely, 2^97744513 is an apocalyptic number.

It is an amenable number.

97744513 is a deficient number, since it is larger than the sum of its proper divisors (1).

97744513 is an equidigital number, since it uses as much as digits as its factorization.

97744513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 97744513 is about 9886.5824732311. The cubic root of 97744513 is about 460.6426320539.

The spelling of 97744513 in words is "ninety-seven million, seven hundred forty-four thousand, five hundred thirteen".