90140039 has 6 divisors (see below), whose sum is σ = 99079680. Its totient is φ = 81945380.

The previous prime is 90140021. The next prime is 90140077. The reversal of 90140039 is 93004109.

It is a happy number.

It is not a de Polignac number, because 90140039 - 2¹⁶ = 90074503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90140339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 372359 + ... + 372600.

It is an arithmetic number, because the mean of its divisors is an integer number (16513280).

Almost surely, 2^90140039 is an apocalyptic number.

90140039 is a deficient number, since it is larger than the sum of its proper divisors (8939641).

90140039 is a wasteful number, since it uses less digits than its factorization.

90140039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744981 (or 744970 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 90140039 is about 9494.2108150177. The cubic root of 90140039 is about 448.3727880714.

The spelling of 90140039 in words is "ninety million, one hundred forty thousand, thirty-nine".