83612090 has 32 divisors (see below), whose sum is σ = 154449936. Its totient is φ = 32578560.

The previous prime is 83612071. The next prime is 83612117. The reversal of 83612090 is 9021638.

It can be written as a sum of positive squares in 8 ways, for example, as 3455881 + 80156209 = 1859^2 + 8953^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68324 + ... + 69536.

Almost surely, 2^83612090 is an apocalyptic number.

83612090 is a deficient number, since it is larger than the sum of its proper divisors (70837846).

83612090 is a wasteful number, since it uses less digits than its factorization.

83612090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 83612090 is about 9143.9646762222. The cubic root of 83612090 is about 437.2767230774.

The spelling of 83612090 in words is "eighty-three million, six hundred twelve thousand, ninety".