1139391694 has 8 divisors (see below), whose sum is σ = 1953242928. Its totient is φ = 488310720.

The previous prime is 1139391689. The next prime is 1139391703. The reversal of 1139391694 is 4961939311.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40692547 + ... + 40692574.

It is an arithmetic number, because the mean of its divisors is an integer number (244155366).

Almost surely, 2^1139391694 is an apocalyptic number.

1139391694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1139391694 is a deficient number, since it is larger than the sum of its proper divisors (813851234).

1139391694 is an equidigital number, since it uses as much as digits as its factorization.

1139391694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81385130.

The product of its digits is 157464, while the sum is 46.

The square root of 1139391694 is about 33754.8765958343. The cubic root of 1139391694 is about 1044.4580858193.

The spelling of 1139391694 in words is "one billion, one hundred thirty-nine million, three hundred ninety-one thousand, six hundred ninety-four".