131527987 has 2 divisors, whose sum is σ = 131527988. Its totient is φ = 131527986.

The previous prime is 131527973. The next prime is 131527999. The reversal of 131527987 is 789725131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131527987 is a prime.

It is a super-2 number, since 2×131527987² = 34599222728544338, which contains 22 as substring.

It is equal to p_7459972 and since 131527987 and 7459972 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (131527387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65763993 + 65763994.

It is an arithmetic number, because the mean of its divisors is an integer number (65763994).

Almost surely, 2^131527987 is an apocalyptic number.

131527987 is a deficient number, since it is larger than the sum of its proper divisors (1).

131527987 is an equidigital number, since it uses as much as digits as its factorization.

131527987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 43.

The square root of 131527987 is about 11468.5651674479. The cubic root of 131527987 is about 508.5567126703.

The spelling of 131527987 in words is "one hundred thirty-one million, five hundred twenty-seven thousand, nine hundred eighty-seven".