131249139 has 8 divisors (see below), whose sum is σ = 199998720. Its totient is φ = 74999496.

The previous prime is 131249137. The next prime is 131249143. The reversal of 131249139 is 931942131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131249139 - 2¹ = 131249137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131249137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3124959 + ... + 3125000.

It is an arithmetic number, because the mean of its divisors is an integer number (24999840).

Almost surely, 2^131249139 is an apocalyptic number.

131249139 is a deficient number, since it is larger than the sum of its proper divisors (68749581).

131249139 is an equidigital number, since it uses as much as digits as its factorization.

131249139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249969.

The product of its digits is 5832, while the sum is 33.

The square root of 131249139 is about 11456.4016602073. The cubic root of 131249139 is about 508.1970671450.

The spelling of 131249139 in words is "one hundred thirty-one million, two hundred forty-nine thousand, one hundred thirty-nine".