91544419 has 2 divisors, whose sum is σ = 91544420. Its totient is φ = 91544418.

The previous prime is 91544407. The next prime is 91544423. The reversal of 91544419 is 91444519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91544419 - 2¹³ = 91536227 is a prime.

It is a super-2 number, since 2×91544419² = 16760761300095122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91544819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45772209 + 45772210.

It is an arithmetic number, because the mean of its divisors is an integer number (45772210).

Almost surely, 2^91544419 is an apocalyptic number.

91544419 is a deficient number, since it is larger than the sum of its proper divisors (1).

91544419 is an equidigital number, since it uses as much as digits as its factorization.

91544419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 91544419 is about 9567.8847714633. The cubic root of 91544419 is about 450.6893451142.

The spelling of 91544419 in words is "ninety-one million, five hundred forty-four thousand, four hundred nineteen".