83722073 has 4 divisors (see below), whose sum is σ = 85094628. Its totient is φ = 82349520.

The previous prime is 83722027. The next prime is 83722081. The reversal of 83722073 is 37022738.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37022738 = 2 ⋅18511369.

It can be written as a sum of positive squares in 2 ways, for example, as 28174864 + 55547209 = 5308^2 + 7453^2 .

It is a cyclic number.

It is not a de Polignac number, because 83722073 - 2²⁶ = 16613209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83722013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686186 + ... + 686307.

It is an arithmetic number, because the mean of its divisors is an integer number (21273657).

Almost surely, 2^83722073 is an apocalyptic number.

It is an amenable number.

83722073 is a deficient number, since it is larger than the sum of its proper divisors (1372555).

83722073 is a wasteful number, since it uses less digits than its factorization.

83722073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372554.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 83722073 is about 9149.9766666369. The cubic root of 83722073 is about 437.4683697405.

The spelling of 83722073 in words is "eighty-three million, seven hundred twenty-two thousand, seventy-three".