1139947031691 has 32 divisors (see below), whose sum is σ = 1825795782720. Its totient is φ = 698776215552.

The previous prime is 1139947031669. The next prime is 1139947031701. The reversal of 1139947031691 is 1961307499311.

1139947031691 is a `hidden beast` number, since 1 + 1 + 3 + 9 + 9 + 470 + 3 + 169 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1139947031691 is a prime.

It is a super-2 number, since 2×1139947031691² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1139947031651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6228300 + ... + 6408713.

It is an arithmetic number, because the mean of its divisors is an integer number (57056118210).

Almost surely, 2^{1139947031691} is an apocalyptic number.

1139947031691 is a deficient number, since it is larger than the sum of its proper divisors (685848751029).

1139947031691 is a wasteful number, since it uses less digits than its factorization.

1139947031691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12637292 (or 12637286 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

It can be divided in two parts, 11399470 and 31691, that added together give a square (11431161 = 3381²).

The spelling of 1139947031691 in words is "one trillion, one hundred thirty-nine billion, nine hundred forty-seven million, thirty-one thousand, six hundred ninety-one".