1139811493 has 8 divisors (see below), whose sum is σ = 1167094656. Its totient is φ = 1112840400.

The previous prime is 1139811479. The next prime is 1139811499. The reversal of 1139811493 is 3941189311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139811493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139811499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70618 + ... + 85243.

It is an arithmetic number, because the mean of its divisors is an integer number (145886832).

Almost surely, 2^1139811493 is an apocalyptic number.

It is an amenable number.

1139811493 is a deficient number, since it is larger than the sum of its proper divisors (27283163).

1139811493 is a wasteful number, since it uses less digits than its factorization.

1139811493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156035.

The product of its digits is 23328, while the sum is 40.

The square root of 1139811493 is about 33761.0943691107. The cubic root of 1139811493 is about 1044.5863439136.

The spelling of 1139811493 in words is "one billion, one hundred thirty-nine million, eight hundred eleven thousand, four hundred ninety-three".