83561290 has 16 divisors (see below), whose sum is σ = 159258312. Its totient is φ = 31458304.

The previous prime is 83561243. The next prime is 83561311. The reversal of 83561290 is 9216538.

It can be written as a sum of positive squares in 4 ways, for example, as 74252689 + 9308601 = 8617^2 + 3051^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 245599 + ... + 245938.

Almost surely, 2^83561290 is an apocalyptic number.

83561290 is a deficient number, since it is larger than the sum of its proper divisors (75697022).

83561290 is a wasteful number, since it uses less digits than its factorization.

83561290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491561.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 83561290 is about 9141.1864656619. The cubic root of 83561290 is about 437.1881467411.

The spelling of 83561290 in words is "eighty-three million, five hundred sixty-one thousand, two hundred ninety".