90837389 has 4 divisors (see below), whose sum is σ = 92551356. Its totient is φ = 89123424.

The previous prime is 90837379. The next prime is 90837391. The reversal of 90837389 is 98373809.

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 25502500 + 65334889 = 5050^2 + 8083^2 .

It is a cyclic number.

It is not a de Polignac number, because 90837389 - 2⁸ = 90837133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90837319) 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, 856904 + ... + 857009.

It is an arithmetic number, because the mean of its divisors is an integer number (23137839).

Almost surely, 2^90837389 is an apocalyptic number.

It is an amenable number.

90837389 is a deficient number, since it is larger than the sum of its proper divisors (1713967).

90837389 is a wasteful number, since it uses less digits than its factorization.

90837389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713966.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 90837389 is about 9530.8650709157. The cubic root of 90837389 is about 449.5260672921.

The spelling of 90837389 in words is "ninety million, eight hundred thirty-seven thousand, three hundred eighty-nine".