1139791851 has 32 divisors (see below), whose sum is σ = 1867357440. Its totient is φ = 681307200.

The previous prime is 1139791847. The next prime is 1139791859. The reversal of 1139791851 is 1581979311.

It is a happy number.

It is not a de Polignac number, because 1139791851 - 2² = 1139791847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1139791797 and 1139791806.

It is not an unprimeable number, because it can be changed into a prime (1139791859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4605 + ... + 47966.

It is an arithmetic number, because the mean of its divisors is an integer number (58354920).

Almost surely, 2^1139791851 is an apocalyptic number.

1139791851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1139791851 is a deficient number, since it is larger than the sum of its proper divisors (727565589).

1139791851 is a wasteful number, since it uses less digits than its factorization.

1139791851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52664 (or 52658 counting only the distinct ones).

The product of its digits is 68040, while the sum is 45.

The square root of 1139791851 is about 33760.8034708891. The cubic root of 1139791851 is about 1044.5803435404.

The spelling of 1139791851 in words is "one billion, one hundred thirty-nine million, seven hundred ninety-one thousand, eight hundred fifty-one".