90029839 has 4 divisors (see below), whose sum is σ = 91505800. Its totient is φ = 88553880.

The previous prime is 90029827. The next prime is 90029857. The reversal of 90029839 is 93892009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93892009 = 41 ⋅2290049.

It is a cyclic number.

It is not a de Polignac number, because 90029839 - 2¹⁵ = 89997071 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 (90029869) 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, 737889 + ... + 738010.

It is an arithmetic number, because the mean of its divisors is an integer number (22876450).

Almost surely, 2^90029839 is an apocalyptic number.

90029839 is a deficient number, since it is larger than the sum of its proper divisors (1475961).

90029839 is a wasteful number, since it uses less digits than its factorization.

90029839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475960.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 90029839 is about 9488.4055035606. The cubic root of 90029839 is about 448.1899953449.

The spelling of 90029839 in words is "ninety million, twenty-nine thousand, eight hundred thirty-nine".