90054439 has 2 divisors, whose sum is σ = 90054440. Its totient is φ = 90054438.

The previous prime is 90054431. The next prime is 90054443. The reversal of 90054439 is 93445009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90054439 - 2³ = 90054431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90054431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45027219 + 45027220.

It is an arithmetic number, because the mean of its divisors is an integer number (45027220).

Almost surely, 2^90054439 is an apocalyptic number.

90054439 is a deficient number, since it is larger than the sum of its proper divisors (1).

90054439 is an equidigital number, since it uses as much as digits as its factorization.

90054439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 90054439 is about 9489.7017339851. The cubic root of 90054439 is about 448.2308131817.

The spelling of 90054439 in words is "ninety million, fifty-four thousand, four hundred thirty-nine".