97191967 has 2 divisors, whose sum is σ = 97191968. Its totient is φ = 97191966.

The previous prime is 97191959. The next prime is 97192013. The reversal of 97191967 is 76919179.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97191967 - 2³ = 97191959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97191967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97191937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48595983 + 48595984.

It is an arithmetic number, because the mean of its divisors is an integer number (48595984).

Almost surely, 2^97191967 is an apocalyptic number.

97191967 is a deficient number, since it is larger than the sum of its proper divisors (1).

97191967 is an equidigital number, since it uses as much as digits as its factorization.

97191967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 214326, while the sum is 49.

The square root of 97191967 is about 9858.5986326658. The cubic root of 97191967 is about 459.7729929068.

The spelling of 97191967 in words is "ninety-seven million, one hundred ninety-one thousand, nine hundred sixty-seven".