131301987 has 4 divisors (see below), whose sum is σ = 175069320. Its totient is φ = 87534656.

The previous prime is 131301979. The next prime is 131301997. The reversal of 131301987 is 789103131.

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 131301987 - 2³ = 131301979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131301997) 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, 21883662 + ... + 21883667.

It is an arithmetic number, because the mean of its divisors is an integer number (43767330).

Almost surely, 2^131301987 is an apocalyptic number.

131301987 is a deficient number, since it is larger than the sum of its proper divisors (43767333).

131301987 is an equidigital number, since it uses as much as digits as its factorization.

131301987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43767332.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 131301987 is about 11458.7079114532. The cubic root of 131301987 is about 508.2652671979.

The spelling of 131301987 in words is "one hundred thirty-one million, three hundred one thousand, nine hundred eighty-seven".