1139481729 has 16 divisors (see below), whose sum is σ = 1787423040. Its totient is φ = 714968640.

The previous prime is 1139481689. The next prime is 1139481731. The reversal of 1139481729 is 9271849311.

It is a de Polignac number, because none of the positive numbers 2^k-1139481729 is a prime.

It is a super-2 number, since 2×1139481729² = 2596837221449658882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1139481779) 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, 1240807 + ... + 1241724.

It is an arithmetic number, because the mean of its divisors is an integer number (111713940).

Almost surely, 2^1139481729 is an apocalyptic number.

It is an amenable number.

1139481729 is a deficient number, since it is larger than the sum of its proper divisors (647941311).

1139481729 is a wasteful number, since it uses less digits than its factorization.

1139481729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482557 (or 2482551 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1139481729 is about 33756.2102286379. The cubic root of 1139481729 is about 1044.4855962027.

The spelling of 1139481729 in words is "one billion, one hundred thirty-nine million, four hundred eighty-one thousand, seven hundred twenty-nine".