1139909731 has 8 divisors (see below), whose sum is σ = 1209067200. Its totient is φ = 1071668520.

The previous prime is 1139909669. The next prime is 1139909737. The reversal of 1139909731 is 1379099311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1139909731 - 2²³ = 1131521123 is a prime.

It is a super-2 number, since 2×1139909731² = 2598788389656984722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1139909737) 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, 226501 + ... + 231478.

It is an arithmetic number, because the mean of its divisors is an integer number (151133400).

Almost surely, 2^1139909731 is an apocalyptic number.

1139909731 is a deficient number, since it is larger than the sum of its proper divisors (69157469).

1139909731 is a wasteful number, since it uses less digits than its factorization.

1139909731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458129.

The product of its (nonzero) digits is 45927, while the sum is 43.

The square root of 1139909731 is about 33762.5492372836. The cubic root of 1139909731 is about 1044.6163532984.

The spelling of 1139909731 in words is "one billion, one hundred thirty-nine million, nine hundred nine thousand, seven hundred thirty-one".