83521090 has 16 divisors (see below), whose sum is σ = 150547320. Its totient is φ = 33361920.

The previous prime is 83521079. The next prime is 83521103. The reversal of 83521090 is 9012538.

It can be written as a sum of positive squares in 4 ways, for example, as 59028489 + 24492601 = 7683^2 + 4949^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2260 + ... + 13120.

Almost surely, 2^83521090 is an apocalyptic number.

83521090 is a deficient number, since it is larger than the sum of its proper divisors (67026230).

83521090 is a wasteful number, since it uses less digits than its factorization.

83521090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11637.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 83521090 is about 9138.9873618470. The cubic root of 83521090 is about 437.1180274207.

It can be divided in two parts, 835210 and 90, that multiplied together give a square (75168900 = 8670²).

The spelling of 83521090 in words is "eighty-three million, five hundred twenty-one thousand, ninety".