83691438 has 8 divisors (see below), whose sum is σ = 167382888. Its totient is φ = 27897144.

The previous prime is 83691427. The next prime is 83691449. The reversal of 83691438 is 83419638.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (83691427) and next prime (83691449).

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

83691438 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 83691438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6974281 + ... + 6974292.

It is an arithmetic number, because the mean of its divisors is an integer number (20922861).

Almost surely, 2^83691438 is an apocalyptic number.

83691438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83691438 is a wasteful number, since it uses less digits than its factorization.

83691438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13948578.

The product of its digits is 124416, while the sum is 42.

The square root of 83691438 is about 9148.3024654851. The cubic root of 83691438 is about 437.4150047675.

The spelling of 83691438 in words is "eighty-three million, six hundred ninety-one thousand, four hundred thirty-eight".