1131986477 has 4 divisors (see below), whose sum is σ = 1132286400. Its totient is φ = 1131686556.

The previous prime is 1131986467. The next prime is 1131986519. The reversal of 1131986477 is 7746891311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7746891311 = 103 ⋅75212537.

It is a cyclic number.

It is not a de Polignac number, because 1131986477 - 2⁶ = 1131986413 is a prime.

It is a super-2 number, since 2×1131986477² = 2562786768221743058, 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 (1131986407) 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 3 ways as a sum of consecutive naturals, for example, 144227 + ... + 151872.

It is an arithmetic number, because the mean of its divisors is an integer number (283071600).

Almost surely, 2^1131986477 is an apocalyptic number.

It is an amenable number.

1131986477 is a deficient number, since it is larger than the sum of its proper divisors (299923).

1131986477 is an equidigital number, since it uses as much as digits as its factorization.

1131986477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299922.

The product of its digits is 254016, while the sum is 47.

The square root of 1131986477 is about 33645.0067171936. The cubic root of 1131986477 is about 1042.1904267830.

The spelling of 1131986477 in words is "one billion, one hundred thirty-one million, nine hundred eighty-six thousand, four hundred seventy-seven".