83764815 has 16 divisors (see below), whose sum is σ = 134159328. Its totient is φ = 44629376.

The previous prime is 83764801. The next prime is 83764819. The reversal of 83764815 is 51846738.

It is a cyclic number.

It is not a de Polignac number, because 83764815 - 2⁵ = 83764783 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83764819) 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, 16969 + ... + 21341.

It is an arithmetic number, because the mean of its divisors is an integer number (8384958).

Almost surely, 2^83764815 is an apocalyptic number.

83764815 is a deficient number, since it is larger than the sum of its proper divisors (50394513).

83764815 is a wasteful number, since it uses less digits than its factorization.

83764815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5658.

The product of its digits is 161280, while the sum is 42.

The square root of 83764815 is about 9152.3120029859. The cubic root of 83764815 is about 437.5428028871.

The spelling of 83764815 in words is "eighty-three million, seven hundred sixty-four thousand, eight hundred fifteen".