83670391 has 16 divisors (see below), whose sum is σ = 98784000. Its totient is φ = 70829304.

The previous prime is 83670383. The next prime is 83670397. The reversal of 83670391 is 19307638.

It is not a de Polignac number, because 83670391 - 2³ = 83670383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83670391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83670397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27000 + ... + 29938.

It is an arithmetic number, because the mean of its divisors is an integer number (6174000).

Almost surely, 2^83670391 is an apocalyptic number.

83670391 is a deficient number, since it is larger than the sum of its proper divisors (15113609).

83670391 is an equidigital number, since it uses as much as digits as its factorization.

83670391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 83670391 is about 9147.1520704534. The cubic root of 83670391 is about 437.3783341687.

The spelling of 83670391 in words is "eighty-three million, six hundred seventy thousand, three hundred ninety-one".