83791399 has 8 divisors (see below), whose sum is σ = 84661632. Its totient is φ = 82924920.

The previous prime is 83791333. The next prime is 83791439. The reversal of 83791399 is 99319738.

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

It is a cyclic number.

It is not a de Polignac number, because 83791399 - 2¹⁹ = 83267111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83701399) 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, 67902 + ... + 69124.

It is an arithmetic number, because the mean of its divisors is an integer number (10582704).

Almost surely, 2^83791399 is an apocalyptic number.

83791399 is a deficient number, since it is larger than the sum of its proper divisors (870233).

83791399 is a wasteful number, since it uses less digits than its factorization.

83791399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877.

The product of its digits is 367416, while the sum is 49.

The square root of 83791399 is about 9153.7641984049. The cubic root of 83791399 is about 437.5890848795.

The spelling of 83791399 in words is "eighty-three million, seven hundred ninety-one thousand, three hundred ninety-nine".