97644691 has 2 divisors, whose sum is σ = 97644692. Its totient is φ = 97644690.

The previous prime is 97644647. The next prime is 97644697. The reversal of 97644691 is 19644679.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97644691 - 2²¹ = 95547539 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97644697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48822345 + 48822346.

It is an arithmetic number, because the mean of its divisors is an integer number (48822346).

Almost surely, 2^97644691 is an apocalyptic number.

97644691 is a deficient number, since it is larger than the sum of its proper divisors (1).

97644691 is an equidigital number, since it uses as much as digits as its factorization.

97644691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 97644691 is about 9881.5328264394. The cubic root of 97644691 is about 460.4857675592.

The spelling of 97644691 in words is "ninety-seven million, six hundred forty-four thousand, six hundred ninety-one".