90863643 has 32 divisors (see below), whose sum is σ = 140313600. Its totient is φ = 51826176.

The previous prime is 90863621. The next prime is 90863653. The reversal of 90863643 is 34636809.

It is not a de Polignac number, because 90863643 - 2⁹ = 90863131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (90863603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33523 + ... + 36131.

It is an arithmetic number, because the mean of its divisors is an integer number (4384800).

Almost surely, 2^90863643 is an apocalyptic number.

90863643 is a deficient number, since it is larger than the sum of its proper divisors (49449957).

90863643 is a wasteful number, since it uses less digits than its factorization.

90863643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 90863643 is about 9532.2422860521. The cubic root of 90863643 is about 449.5693707552.

The spelling of 90863643 in words is "ninety million, eight hundred sixty-three thousand, six hundred forty-three".