131009787 has 12 divisors (see below), whose sum is σ = 189913464. Its totient is φ = 87027360.

The previous prime is 131009743. The next prime is 131009789. The reversal of 131009787 is 787900131.

It is not a de Polignac number, because 131009787 - 2¹² = 131005691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131009789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23373 + ... + 28430.

It is an arithmetic number, because the mean of its divisors is an integer number (15826122).

Almost surely, 2^131009787 is an apocalyptic number.

131009787 is a deficient number, since it is larger than the sum of its proper divisors (58903677).

131009787 is a wasteful number, since it uses less digits than its factorization.

131009787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52090 (or 52087 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 131009787 is about 11445.9506813545. The cubic root of 131009787 is about 507.8879552735.

The spelling of 131009787 in words is "one hundred thirty-one million, nine thousand, seven hundred eighty-seven".