9272139 has 4 divisors (see below), whose sum is σ = 12362856. Its totient is φ = 6181424.

The previous prime is 9272129. The next prime is 9272147. The reversal of 9272139 is 9312729.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9312729 = 3 ⋅3104243.

It is a cyclic number.

It is not a de Polignac number, because 9272139 - 2²¹ = 7174987 is a prime.

It is a d-powerful number, because it can be written as 9² + 2⁷ + 7⁷ + 2²³ + 1 + 3¹⁰ + 9³ .

It is not an unprimeable number, because it can be changed into a prime (9272129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1545354 + ... + 1545359.

It is an arithmetic number, because the mean of its divisors is an integer number (3090714).

Almost surely, 2^9272139 is an apocalyptic number.

9272139 is a deficient number, since it is larger than the sum of its proper divisors (3090717).

9272139 is a wasteful number, since it uses less digits than its factorization.

9272139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090716.

The product of its digits is 6804, while the sum is 33.

The square root of 9272139 is about 3045.0187191543. The cubic root of 9272139 is about 210.0841612777.

The spelling of 9272139 in words is "nine million, two hundred seventy-two thousand, one hundred thirty-nine".