90437615 has 4 divisors (see below), whose sum is σ = 108525144. Its totient is φ = 72350088.

The previous prime is 90437609. The next prime is 90437621. The reversal of 90437615 is 51673409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51673409 = 643 ⋅80363.

It is an interprime number because it is at equal distance from previous prime (90437609) and next prime (90437621).

It is a cyclic number.

It is not a de Polignac number, because 90437615 - 2⁶ = 90437551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9043757 + ... + 9043766.

It is an arithmetic number, because the mean of its divisors is an integer number (27131286).

Almost surely, 2^90437615 is an apocalyptic number.

90437615 is a deficient number, since it is larger than the sum of its proper divisors (18087529).

90437615 is a wasteful number, since it uses less digits than its factorization.

90437615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18087528.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 90437615 is about 9509.8693471572. The cubic root of 90437615 is about 448.8656449908.

The spelling of 90437615 in words is "ninety million, four hundred thirty-seven thousand, six hundred fifteen".