83630581 has 4 divisors (see below), whose sum is σ = 83948832. Its totient is φ = 83312332.

The previous prime is 83630579. The next prime is 83630597. The reversal of 83630581 is 18503638.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83630581 - 2¹ = 83630579 is a prime.

It is a super-2 number, since 2×83630581² = 13988148156795122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83630501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158731 + ... + 159256.

It is an arithmetic number, because the mean of its divisors is an integer number (20987208).

Almost surely, 2^83630581 is an apocalyptic number.

It is an amenable number.

83630581 is a deficient number, since it is larger than the sum of its proper divisors (318251).

83630581 is a wasteful number, since it uses less digits than its factorization.

83630581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318250.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 83630581 is about 9144.9757244074. The cubic root of 83630581 is about 437.3089556086.

The spelling of 83630581 in words is "eighty-three million, six hundred thirty thousand, five hundred eighty-one".