83012945 has 4 divisors (see below), whose sum is σ = 99615540. Its totient is φ = 66410352.

The previous prime is 83012939. The next prime is 83012959. The reversal of 83012945 is 54921038.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35664784 + 47348161 = 5972^2 + 6881^2 .

It is a cyclic number.

It is not a de Polignac number, because 83012945 - 2⁴ = 83012929 is a prime.

It is a super-2 number, since 2×83012945² = 13782298075146050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8301290 + ... + 8301299.

It is an arithmetic number, because the mean of its divisors is an integer number (24903885).

Almost surely, 2^83012945 is an apocalyptic number.

It is an amenable number.

83012945 is a deficient number, since it is larger than the sum of its proper divisors (16602595).

83012945 is a wasteful number, since it uses less digits than its factorization.

83012945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16602594.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 83012945 is about 9111.1440006181. The cubic root of 83012945 is about 436.2297434786.

The spelling of 83012945 in words is "eighty-three million, twelve thousand, nine hundred forty-five".