97190251 has 2 divisors, whose sum is σ = 97190252. Its totient is φ = 97190250.

The previous prime is 97190243. The next prime is 97190257. The reversal of 97190251 is 15209179.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97190251 - 2³ = 97190243 is a prime.

It is not a weakly prime, because it can be changed into another prime (97190257) 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, 48595125 + 48595126.

It is an arithmetic number, because the mean of its divisors is an integer number (48595126).

Almost surely, 2^97190251 is an apocalyptic number.

97190251 is a deficient number, since it is larger than the sum of its proper divisors (1).

97190251 is an equidigital number, since it uses as much as digits as its factorization.

97190251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 97190251 is about 9858.5116016567. The cubic root of 97190251 is about 459.7702870072.

The spelling of 97190251 in words is "ninety-seven million, one hundred ninety thousand, two hundred fifty-one".