97908997 has 2 divisors, whose sum is σ = 97908998. Its totient is φ = 97908996.

The previous prime is 97908983. The next prime is 97909003. The reversal of 97908997 is 79980979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91221601 + 6687396 = 9551^2 + 2586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97908997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97900997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48954498 + 48954499.

It is an arithmetic number, because the mean of its divisors is an integer number (48954499).

Almost surely, 2^97908997 is an apocalyptic number.

It is an amenable number.

97908997 is a deficient number, since it is larger than the sum of its proper divisors (1).

97908997 is an equidigital number, since it uses as much as digits as its factorization.

97908997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 58.

The square root of 97908997 is about 9894.8975234714. The cubic root of 97908997 is about 460.9008763249.

The spelling of 97908997 in words is "ninety-seven million, nine hundred eight thousand, nine hundred ninety-seven".