89902381 has 4 divisors (see below), whose sum is σ = 92095164. Its totient is φ = 87709600.

The previous prime is 89902369. The next prime is 89902457. The reversal of 89902381 is 18320998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18320998 = 2 ⋅9160499.

It can be written as a sum of positive squares in 2 ways, for example, as 44555625 + 45346756 = 6675^2 + 6734^2 .

It is a cyclic number.

It is not a de Polignac number, because 89902381 - 2⁹ = 89901869 is a prime.

It is a super-2 number, since 2×89902381² = 16164876218938322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89902321) 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, 1096330 + ... + 1096411.

It is an arithmetic number, because the mean of its divisors is an integer number (23023791).

Almost surely, 2^89902381 is an apocalyptic number.

It is an amenable number.

89902381 is a deficient number, since it is larger than the sum of its proper divisors (2192783).

89902381 is a wasteful number, since it uses less digits than its factorization.

89902381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192782.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 89902381 is about 9481.6866115686. The cubic root of 89902381 is about 447.9783900211.

The spelling of 89902381 in words is "eighty-nine million, nine hundred two thousand, three hundred eighty-one".