131591747 has 8 divisors (see below), whose sum is σ = 159237216. Its totient is φ = 106157952.

The previous prime is 131591743. The next prime is 131591749. The reversal of 131591747 is 747195131.

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

It is a cyclic number.

It is not a de Polignac number, because 131591747 - 2² = 131591743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131591747.

It is not an unprimeable number, because it can be changed into a prime (131591741) 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, 552788 + ... + 553025.

It is an arithmetic number, because the mean of its divisors is an integer number (19904652).

Almost surely, 2^131591747 is an apocalyptic number.

131591747 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

131591747 is a deficient number, since it is larger than the sum of its proper divisors (27645469).

131591747 is a wasteful number, since it uses less digits than its factorization.

131591747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105837.

The product of its digits is 26460, while the sum is 38.

The square root of 131591747 is about 11471.3446029661. The cubic root of 131591747 is about 508.6388760146.

The spelling of 131591747 in words is "one hundred thirty-one million, five hundred ninety-one thousand, seven hundred forty-seven".