131120777 has 4 divisors (see below), whose sum is σ = 131143680. Its totient is φ = 131097876.

The previous prime is 131120749. The next prime is 131120831. The reversal of 131120777 is 777021131.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 777021131 = 19 ⋅40895849.

It is a cyclic number.

It is not a de Polignac number, because 131120777 - 2⁶ = 131120713 is a prime.

It is a super-2 number, since 2×131120777² = 34385316322167458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131120707) 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, 5624 + ... + 17142.

It is an arithmetic number, because the mean of its divisors is an integer number (32785920).

Almost surely, 2^131120777 is an apocalyptic number.

It is an amenable number.

131120777 is a deficient number, since it is larger than the sum of its proper divisors (22903).

131120777 is a wasteful number, since it uses less digits than its factorization.

131120777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22902.

The product of its (nonzero) digits is 2058, while the sum is 29.

The square root of 131120777 is about 11450.7980944561. The cubic root of 131120777 is about 508.0313404208.

The spelling of 131120777 in words is "one hundred thirty-one million, one hundred twenty thousand, seven hundred seventy-seven".