90894389 has 4 divisors (see below), whose sum is σ = 93008256. Its totient is φ = 88780524.

The previous prime is 90894383. The next prime is 90894407. The reversal of 90894389 is 98349809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90894389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90894383) 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, 1056869 + ... + 1056954.

It is an arithmetic number, because the mean of its divisors is an integer number (23252064).

Almost surely, 2^90894389 is an apocalyptic number.

It is an amenable number.

90894389 is a deficient number, since it is larger than the sum of its proper divisors (2113867).

90894389 is a wasteful number, since it uses less digits than its factorization.

90894389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113866.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 90894389 is about 9533.8548866657. The cubic root of 90894389 is about 449.6200727399.

The spelling of 90894389 in words is "ninety million, eight hundred ninety-four thousand, three hundred eighty-nine".