9155728939 has 12 divisors (see below), whose sum is σ = 11017803600. Its totient is φ = 7577153808.

The previous prime is 9155728931. The next prime is 9155728961. The reversal of 9155728939 is 9398275519.

It is not a de Polignac number, because 9155728939 - 2³ = 9155728931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9155728931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3220159 + ... + 3223000.

It is an arithmetic number, because the mean of its divisors is an integer number (918150300).

Almost surely, 2^9155728939 is an apocalyptic number.

9155728939 is a deficient number, since it is larger than the sum of its proper divisors (1862074661).

9155728939 is a wasteful number, since it uses less digits than its factorization.

9155728939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6443202 (or 6443195 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 58.

The square root of 9155728939 is about 95685.5733065335. The cubic root of 9155728939 is about 2092.0126624290.

The spelling of 9155728939 in words is "nine billion, one hundred fifty-five million, seven hundred twenty-eight thousand, nine hundred thirty-nine".