97909949 has 2 divisors, whose sum is σ = 97909950. Its totient is φ = 97909948.

The previous prime is 97909943. The next prime is 97909963. The reversal of 97909949 is 94990979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88698724 + 9211225 = 9418^2 + 3035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97909949 is a prime.

It is a super-2 number, since 2×97909949² = 19172716226365202, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 97909894 and 97909903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97909943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48954974 + 48954975.

It is an arithmetic number, because the mean of its divisors is an integer number (48954975).

Almost surely, 2^97909949 is an apocalyptic number.

It is an amenable number.

97909949 is a deficient number, since it is larger than the sum of its proper divisors (1).

97909949 is an equidigital number, since it uses as much as digits as its factorization.

97909949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1653372, while the sum is 56.

The square root of 97909949 is about 9894.9456289562. The cubic root of 97909949 is about 460.9023701481.

The spelling of 97909949 in words is "ninety-seven million, nine hundred nine thousand, nine hundred forty-nine".