131321377 has 4 divisors (see below), whose sum is σ = 143259696. Its totient is φ = 119383060.

The previous prime is 131321357. The next prime is 131321383. The reversal of 131321377 is 773123131.

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: 773123131 = 11 ⋅70283921.

It is a cyclic number.

It is not a de Polignac number, because 131321377 - 2⁷ = 131321249 is a prime.

It is a super-2 number, since 2×131321377² = 34490608114352258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131321317) 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, 5969143 + ... + 5969164.

It is an arithmetic number, because the mean of its divisors is an integer number (35814924).

Almost surely, 2^131321377 is an apocalyptic number.

It is an amenable number.

131321377 is a deficient number, since it is larger than the sum of its proper divisors (11938319).

131321377 is a wasteful number, since it uses less digits than its factorization.

131321377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11938318.

The product of its digits is 2646, while the sum is 28.

The square root of 131321377 is about 11459.5539616514. The cubic root of 131321377 is about 508.2902852972.

The spelling of 131321377 in words is "one hundred thirty-one million, three hundred twenty-one thousand, three hundred seventy-seven".