83779993 has 8 divisors (see below), whose sum is σ = 91697760. Its totient is φ = 75912480.

The previous prime is 83779973. The next prime is 83779999. The reversal of 83779993 is 39997738.

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 83779993 - 2²⁵ = 50225561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83779999) 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, 9028 + ... + 15781.

It is an arithmetic number, because the mean of its divisors is an integer number (11462220).

Almost surely, 2^83779993 is an apocalyptic number.

It is an amenable number.

83779993 is a deficient number, since it is larger than the sum of its proper divisors (7917767).

83779993 is a wasteful number, since it uses less digits than its factorization.

83779993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25127.

The product of its digits is 2571912, while the sum is 55.

The square root of 83779993 is about 9153.1411548167. The cubic root of 83779993 is about 437.5692285551.

The spelling of 83779993 in words is "eighty-three million, seven hundred seventy-nine thousand, nine hundred ninety-three".