1131582947 has 4 divisors (see below), whose sum is σ = 1234454136. Its totient is φ = 1028711760.

The previous prime is 1131582937. The next prime is 1131582971. The reversal of 1131582947 is 7492851311.

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 1131582947 - 2⁸ = 1131582691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131582937) 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, 51435578 + ... + 51435599.

It is an arithmetic number, because the mean of its divisors is an integer number (308613534).

Almost surely, 2^1131582947 is an apocalyptic number.

1131582947 is a deficient number, since it is larger than the sum of its proper divisors (102871189).

1131582947 is a wasteful number, since it uses less digits than its factorization.

1131582947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102871188.

The product of its digits is 60480, while the sum is 41.

The square root of 1131582947 is about 33639.0093046748. The cubic root of 1131582947 is about 1042.0665722157.

The spelling of 1131582947 in words is "one billion, one hundred thirty-one million, five hundred eighty-two thousand, nine hundred forty-seven".