90139033 has 4 divisors (see below), whose sum is σ = 92337588. Its totient is φ = 87940480.

The previous prime is 90139031. The next prime is 90139037. The reversal of 90139033 is 33093109.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24334489 + 65804544 = 4933^2 + 8112^2 .

It is a cyclic number.

It is not a de Polignac number, because 90139033 - 2¹ = 90139031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90138992 and 90139010.

It is not an unprimeable number, because it can be changed into a prime (90139031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099216 + ... + 1099297.

It is an arithmetic number, because the mean of its divisors is an integer number (23084397).

Almost surely, 2^90139033 is an apocalyptic number.

It is an amenable number.

90139033 is a deficient number, since it is larger than the sum of its proper divisors (2198555).

90139033 is a wasteful number, since it uses less digits than its factorization.

90139033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198554.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 90139033 is about 9494.1578352163. The cubic root of 90139033 is about 448.3711200568.

The spelling of 90139033 in words is "ninety million, one hundred thirty-nine thousand, thirty-three".