83637961 has 4 divisors (see below), whose sum is σ = 91241424. Its totient is φ = 76034500.

The previous prime is 83637947. The next prime is 83637971. The reversal of 83637961 is 16973638.

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 83637961 - 2¹³ = 83629769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83637971) 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, 3801715 + ... + 3801736.

It is an arithmetic number, because the mean of its divisors is an integer number (22810356).

Almost surely, 2^83637961 is an apocalyptic number.

It is an amenable number.

83637961 is a deficient number, since it is larger than the sum of its proper divisors (7603463).

83637961 is a wasteful number, since it uses less digits than its factorization.

83637961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603462.

The product of its digits is 163296, while the sum is 43.

The square root of 83637961 is about 9145.3792157570. The cubic root of 83637961 is about 437.3218187070.

The spelling of 83637961 in words is "eighty-three million, six hundred thirty-seven thousand, nine hundred sixty-one".