97644539 has 2 divisors, whose sum is σ = 97644540. Its totient is φ = 97644538.

The previous prime is 97644523. The next prime is 97644541. The reversal of 97644539 is 93544679.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97644539 - 2⁴ = 97644523 is a prime.

Together with 97644541, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 97644493 and 97644502.

It is not a weakly prime, because it can be changed into another prime (97644509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48822269 + 48822270.

It is an arithmetic number, because the mean of its divisors is an integer number (48822270).

Almost surely, 2^97644539 is an apocalyptic number.

97644539 is a deficient number, since it is larger than the sum of its proper divisors (1).

97644539 is an equidigital number, since it uses as much as digits as its factorization.

97644539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 97644539 is about 9881.5251353220. The cubic root of 97644539 is about 460.4855286185.

The spelling of 97644539 in words is "ninety-seven million, six hundred forty-four thousand, five hundred thirty-nine".