83790031 has 6 divisors (see below), whose sum is σ = 90731400. Its totient is φ = 77344488.

The previous prime is 83790023. The next prime is 83790043. The reversal of 83790031 is 13009738.

It is not a de Polignac number, because 83790031 - 2³ = 83790023 is a prime.

It is a super-2 number, since 2×83790031² = 14041538589961922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83789975 and 83790002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83790061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 247731 + ... + 248068.

It is an arithmetic number, because the mean of its divisors is an integer number (15121900).

Almost surely, 2^83790031 is an apocalyptic number.

83790031 is a deficient number, since it is larger than the sum of its proper divisors (6941369).

83790031 is a wasteful number, since it uses less digits than its factorization.

83790031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495825 (or 495812 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 83790031 is about 9153.6894747419. The cubic root of 83790031 is about 437.5867034691.

Adding to 83790031 its reverse (13009738), we get a palindrome (96799769).

The spelling of 83790031 in words is "eighty-three million, seven hundred ninety thousand, thirty-one".