91924487 has 2 divisors, whose sum is σ = 91924488. Its totient is φ = 91924486.

The previous prime is 91924439. The next prime is 91924541. The reversal of 91924487 is 78442919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91924487 - 2¹⁸ = 91662343 is a prime.

It is a super-2 number, since 2×91924487² = 16900222620426338, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91954487) 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, 45962243 + 45962244.

It is an arithmetic number, because the mean of its divisors is an integer number (45962244).

Almost surely, 2^91924487 is an apocalyptic number.

91924487 is a deficient number, since it is larger than the sum of its proper divisors (1).

91924487 is an equidigital number, since it uses as much as digits as its factorization.

91924487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 91924487 is about 9587.7258513164. The cubic root of 91924487 is about 451.3121979014.

The spelling of 91924487 in words is "ninety-one million, nine hundred twenty-four thousand, four hundred eighty-seven".