1147992431 has 4 divisors (see below), whose sum is σ = 1156755864. Its totient is φ = 1139229000.

The previous prime is 1147992427. The next prime is 1147992467. The reversal of 1147992431 is 1342997411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1147992431 - 2² = 1147992427 is a prime.

It is a super-2 number, since 2×1147992431² = 2635773243266579522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147992401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4381520 + ... + 4381781.

It is an arithmetic number, because the mean of its divisors is an integer number (289188966).

Almost surely, 2^1147992431 is an apocalyptic number.

1147992431 is a deficient number, since it is larger than the sum of its proper divisors (8763433).

1147992431 is an equidigital number, since it uses as much as digits as its factorization.

1147992431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8763432.

The product of its digits is 54432, while the sum is 41.

The square root of 1147992431 is about 33882.0369960249. The cubic root of 1147992431 is about 1047.0795432641.

The spelling of 1147992431 in words is "one billion, one hundred forty-seven million, nine hundred ninety-two thousand, four hundred thirty-one".