97017721 has 2 divisors, whose sum is σ = 97017722. Its totient is φ = 97017720.

The previous prime is 97017677. The next prime is 97017797. The reversal of 97017721 is 12771079.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73359225 + 23658496 = 8565^2 + 4864^2 .

It is a cyclic number.

It is not a de Polignac number, because 97017721 - 2⁷ = 97017593 is a prime.

It is not a weakly prime, because it can be changed into another prime (97017121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48508860 + 48508861.

It is an arithmetic number, because the mean of its divisors is an integer number (48508861).

Almost surely, 2^97017721 is an apocalyptic number.

It is an amenable number.

97017721 is a deficient number, since it is larger than the sum of its proper divisors (1).

97017721 is an equidigital number, since it uses as much as digits as its factorization.

97017721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 97017721 is about 9849.7574081802. The cubic root of 97017721 is about 459.4980678244.

The spelling of 97017721 in words is "ninety-seven million, seventeen thousand, seven hundred twenty-one".