72083709 has 8 divisors (see below), whose sum is σ = 106790720. Its totient is φ = 48055788.

The previous prime is 72083651. The next prime is 72083729. The reversal of 72083709 is 90738027.

It is not a de Polignac number, because 72083709 - 2⁹ = 72083197 is a prime.

It is a super-2 number, since 2×72083709² = 10392122206393362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72083729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334857 + ... + 1334910.

It is an arithmetic number, because the mean of its divisors is an integer number (13348840).

Almost surely, 2^72083709 is an apocalyptic number.

It is an amenable number.

72083709 is a deficient number, since it is larger than the sum of its proper divisors (34707011).

72083709 is a wasteful number, since it uses less digits than its factorization.

72083709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669776 (or 2669770 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 72083709 is about 8490.2125415092. The cubic root of 72083709 is about 416.1779260001.

The spelling of 72083709 in words is "seventy-two million, eighty-three thousand, seven hundred nine".