91940351 has 2 divisors, whose sum is σ = 91940352. Its totient is φ = 91940350.

The previous prime is 91940339. The next prime is 91940357. The reversal of 91940351 is 15304919.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91940351 - 2⁶ = 91940287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91940357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45970175 + 45970176.

It is an arithmetic number, because the mean of its divisors is an integer number (45970176).

Almost surely, 2^91940351 is an apocalyptic number.

91940351 is a deficient number, since it is larger than the sum of its proper divisors (1).

91940351 is an equidigital number, since it uses as much as digits as its factorization.

91940351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 91940351 is about 9588.5531233862. The cubic root of 91940351 is about 451.3381583577.

The spelling of 91940351 in words is "ninety-one million, nine hundred forty thousand, three hundred fifty-one".