83817764 has 6 divisors (see below), whose sum is σ = 146681094. Its totient is φ = 41908880.

The previous prime is 83817763. The next prime is 83817781. The reversal of 83817764 is 46771838.

It can be written as a sum of positive squares in only one way, i.e., 60217600 + 23600164 = 7760^2 + 4858^2 .

It is not an unprimeable number, because it can be changed into a prime (83817761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477217 + ... + 10477224.

It is an arithmetic number, because the mean of its divisors is an integer number (24446849).

Almost surely, 2^83817764 is an apocalyptic number.

It is an amenable number.

83817764 is a deficient number, since it is larger than the sum of its proper divisors (62863330).

83817764 is a wasteful number, since it uses less digits than its factorization.

83817764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20954445 (or 20954443 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 83817764 is about 9155.2042030749. The cubic root of 83817764 is about 437.6349759317.

The spelling of 83817764 in words is "eighty-three million, eight hundred seventeen thousand, seven hundred sixty-four".