97664401 has 2 divisors, whose sum is σ = 97664402. Its totient is φ = 97664400.

The previous prime is 97664387. The next prime is 97664429. The reversal of 97664401 is 10446679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81018001 + 16646400 = 9001^2 + 4080^2 .

It is an emirp because it is prime and its reverse (10446679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97664401 - 2¹¹ = 97662353 is a prime.

It is a Chen prime.

It is equal to p_5634748 and since 97664401 and 5634748 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (97664471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48832200 + 48832201.

It is an arithmetic number, because the mean of its divisors is an integer number (48832201).

Almost surely, 2^97664401 is an apocalyptic number.

It is an amenable number.

97664401 is a deficient number, since it is larger than the sum of its proper divisors (1).

97664401 is an equidigital number, since it uses as much as digits as its factorization.

97664401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 97664401 is about 9882.5300910243. The cubic root of 97664401 is about 460.5167491510.

The spelling of 97664401 in words is "ninety-seven million, six hundred sixty-four thousand, four hundred one".