9072739 has 16 divisors (see below), whose sum is σ = 10321920. Its totient is φ = 7915680.

The previous prime is 9072731. The next prime is 9072757. The reversal of 9072739 is 9372709.

It is a cyclic number.

It is not a de Polignac number, because 9072739 - 2³ = 9072731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9072698 and 9072707.

It is not an unprimeable number, because it can be changed into a prime (9072731) 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, 18702 + ... + 19180.

It is an arithmetic number, because the mean of its divisors is an integer number (645120).

Almost surely, 2^9072739 is an apocalyptic number.

9072739 is a deficient number, since it is larger than the sum of its proper divisors (1249181).

9072739 is a wasteful number, since it uses less digits than its factorization.

9072739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 9072739 is about 3012.0987699609. The cubic root of 9072739 is about 208.5672616428.

It can be divided in two parts, 90727 and 39, that multiplied together give a palindrome (3538353).

The spelling of 9072739 in words is "nine million, seventy-two thousand, seven hundred thirty-nine".