97191937 has 2 divisors, whose sum is σ = 97191938. Its totient is φ = 97191936.

The previous prime is 97191901. The next prime is 97191959. The reversal of 97191937 is 73919179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91412721 + 5779216 = 9561^2 + 2404^2 .

It is a cyclic number.

It is not a de Polignac number, because 97191937 - 2¹¹ = 97189889 is a prime.

It is not a weakly prime, because it can be changed into another prime (97191967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48595968 + 48595969.

It is an arithmetic number, because the mean of its divisors is an integer number (48595969).

Almost surely, 2^97191937 is an apocalyptic number.

It is an amenable number.

97191937 is a deficient number, since it is larger than the sum of its proper divisors (1).

97191937 is an equidigital number, since it uses as much as digits as its factorization.

97191937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107163, while the sum is 46.

The square root of 97191937 is about 9858.5971111513. The cubic root of 97191937 is about 459.7729456011.

The spelling of 97191937 in words is "ninety-seven million, one hundred ninety-one thousand, nine hundred thirty-seven".