82921064 has 8 divisors (see below), whose sum is σ = 155477010. Its totient is φ = 41460528.

The previous prime is 82921061. The next prime is 82921079. The reversal of 82921064 is 46012928.

It can be written as a sum of positive squares in only one way, i.e., 74684164 + 8236900 = 8642^2 + 2870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 82921064.

It is not an unprimeable number, because it can be changed into a prime (82921061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5182559 + ... + 5182574.

Almost surely, 2^82921064 is an apocalyptic number.

It is an amenable number.

82921064 is a deficient number, since it is larger than the sum of its proper divisors (72555946).

82921064 is a wasteful number, since it uses less digits than its factorization.

82921064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365139 (or 10365135 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 82921064 is about 9106.1003728270. The cubic root of 82921064 is about 436.0687403892.

The spelling of 82921064 in words is "eighty-two million, nine hundred twenty-one thousand, sixty-four".