90419139 has 32 divisors (see below), whose sum is σ = 137479680. Its totient is φ = 58716000.

The previous prime is 90419111. The next prime is 90419143. The reversal of 90419139 is 93191409.

It is not a de Polignac number, because 90419139 - 2⁸ = 90418883 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (90419179) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193384 + ... + 193850.

It is an arithmetic number, because the mean of its divisors is an integer number (4296240).

Almost surely, 2^90419139 is an apocalyptic number.

90419139 is a deficient number, since it is larger than the sum of its proper divisors (47060541).

90419139 is a wasteful number, since it uses less digits than its factorization.

90419139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 90419139 is about 9508.8978856648. The cubic root of 90419139 is about 448.8350758282.

The spelling of 90419139 in words is "ninety million, four hundred nineteen thousand, one hundred thirty-nine".