83663789 has 4 divisors (see below), whose sum is σ = 91269600. Its totient is φ = 76057980.

The previous prime is 83663777. The next prime is 83663791. The reversal of 83663789 is 98736638.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83663789 - 2⁸ = 83663533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83663759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3802889 + ... + 3802910.

It is an arithmetic number, because the mean of its divisors is an integer number (22817400).

Almost surely, 2^83663789 is an apocalyptic number.

It is an amenable number.

83663789 is a deficient number, since it is larger than the sum of its proper divisors (7605811).

83663789 is a wasteful number, since it uses less digits than its factorization.

83663789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605810.

The product of its digits is 1306368, while the sum is 50.

The square root of 83663789 is about 9146.7911859843. The cubic root of 83663789 is about 437.3668301082.

The spelling of 83663789 in words is "eighty-three million, six hundred sixty-three thousand, seven hundred eighty-nine".