90045419 has 2 divisors, whose sum is σ = 90045420. Its totient is φ = 90045418.

The previous prime is 90045407. The next prime is 90045443. The reversal of 90045419 is 91454009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90045419 - 2²⁴ = 73268203 is a prime.

It is a super-2 number, since 2×90045419² = 16216354965771122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (90045469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45022709 + 45022710.

It is an arithmetic number, because the mean of its divisors is an integer number (45022710).

Almost surely, 2^90045419 is an apocalyptic number.

90045419 is a deficient number, since it is larger than the sum of its proper divisors (1).

90045419 is an equidigital number, since it uses as much as digits as its factorization.

90045419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 90045419 is about 9489.2264700554. The cubic root of 90045419 is about 448.2158475048.

The spelling of 90045419 in words is "ninety million, forty-five thousand, four hundred nineteen".