890402039 has 4 divisors (see below), whose sum is σ = 890598456. Its totient is φ = 890205624.

The previous prime is 890402011. The next prime is 890402063. The reversal of 890402039 is 930204098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930204098 = 2 ⋅465102049.

It is a cyclic number.

It is not a de Polignac number, because 890402039 - 2²⁴ = 873624823 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 (890402069) 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 3 ways as a sum of consecutive naturals, for example, 91244 + ... + 100529.

It is an arithmetic number, because the mean of its divisors is an integer number (222649614).

Almost surely, 2^890402039 is an apocalyptic number.

890402039 is a deficient number, since it is larger than the sum of its proper divisors (196417).

890402039 is a wasteful number, since it uses less digits than its factorization.

890402039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196416.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 890402039 is about 29839.6052085144. The cubic root of 890402039 is about 962.0449892731.

The spelling of 890402039 in words is "eight hundred ninety million, four hundred two thousand, thirty-nine".