83722139 has 16 divisors (see below), whose sum is σ = 89750592. Its totient is φ = 77920128.

The previous prime is 83722117. The next prime is 83722141. The reversal of 83722139 is 93122738.

It is a cyclic number.

It is not a de Polignac number, because 83722139 - 2¹⁶ = 83656603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83722099 and 83722108.

It is not an unprimeable number, because it can be changed into a prime (83722169) 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, 210689 + ... + 211085.

It is an arithmetic number, because the mean of its divisors is an integer number (5609412).

Almost surely, 2^83722139 is an apocalyptic number.

83722139 is a deficient number, since it is larger than the sum of its proper divisors (6028453).

83722139 is a wasteful number, since it uses less digits than its factorization.

83722139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its digits is 18144, while the sum is 35.

The square root of 83722139 is about 9149.9802732028. The cubic root of 83722139 is about 437.4684846958.

The spelling of 83722139 in words is "eighty-three million, seven hundred twenty-two thousand, one hundred thirty-nine".