83665131 has 8 divisors (see below), whose sum is σ = 121694784. Its totient is φ = 50706120.

The previous prime is 83665121. The next prime is 83665157. The reversal of 83665131 is 13156638.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83665131 - 2⁷ = 83665003 is a prime.

It is a super-2 number, since 2×83665131² = 13999708290494322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2535307 = 83665131 / (8 + 3 + 6 + 6 + 5 + 1 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 83665092 and 83665101.

It is not an unprimeable number, because it can be changed into a prime (83665121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1267621 + ... + 1267686.

It is an arithmetic number, because the mean of its divisors is an integer number (15211848).

Almost surely, 2^83665131 is an apocalyptic number.

83665131 is a deficient number, since it is larger than the sum of its proper divisors (38029653).

83665131 is a wasteful number, since it uses less digits than its factorization.

83665131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535321.

The product of its digits is 12960, while the sum is 33.

The square root of 83665131 is about 9146.8645447497. The cubic root of 83665131 is about 437.3691686076.

The spelling of 83665131 in words is "eighty-three million, six hundred sixty-five thousand, one hundred thirty-one".