131139799 has 4 divisors (see below), whose sum is σ = 149874064. Its totient is φ = 112405536.

The previous prime is 131139797. The next prime is 131139821. The reversal of 131139799 is 997931131.

It is a happy number.

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 131139799 - 2¹ = 131139797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131139791) 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, 9367122 + ... + 9367135.

It is an arithmetic number, because the mean of its divisors is an integer number (37468516).

Almost surely, 2^131139799 is an apocalyptic number.

131139799 is a deficient number, since it is larger than the sum of its proper divisors (18734265).

131139799 is an equidigital number, since it uses as much as digits as its factorization.

131139799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18734264.

The product of its digits is 45927, while the sum is 43.

The square root of 131139799 is about 11451.6286614612. The cubic root of 131139799 is about 508.0559063340.

The spelling of 131139799 in words is "one hundred thirty-one million, one hundred thirty-nine thousand, seven hundred ninety-nine".