91419487 has 2 divisors, whose sum is σ = 91419488. Its totient is φ = 91419486.

The previous prime is 91419451. The next prime is 91419509. The reversal of 91419487 is 78491419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91419487 - 2⁷ = 91419359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91419407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45709743 + 45709744.

It is an arithmetic number, because the mean of its divisors is an integer number (45709744).

Almost surely, 2^91419487 is an apocalyptic number.

91419487 is a deficient number, since it is larger than the sum of its proper divisors (1).

91419487 is an equidigital number, since it uses as much as digits as its factorization.

91419487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 91419487 is about 9561.3538267340. The cubic root of 91419487 is about 450.4842310105.

The spelling of 91419487 in words is "ninety-one million, four hundred nineteen thousand, four hundred eighty-seven".