131924647 has 4 divisors (see below), whose sum is σ = 135490216. Its totient is φ = 128359080.

The previous prime is 131924633. The next prime is 131924671. The reversal of 131924647 is 746429131.

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 131924647 - 2⁷ = 131924519 is a prime.

It is a super-2 number, since 2×131924647² = 34808224972149218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 3565531 = 131924647 / (1 + 3 + 1 + 9 + 2 + 4 + 6 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131924627) 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, 1782729 + ... + 1782802.

It is an arithmetic number, because the mean of its divisors is an integer number (33872554).

Almost surely, 2^131924647 is an apocalyptic number.

131924647 is a deficient number, since it is larger than the sum of its proper divisors (3565569).

131924647 is an equidigital number, since it uses as much as digits as its factorization.

131924647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565568.

The product of its digits is 36288, while the sum is 37.

The square root of 131924647 is about 11485.8455065354. The cubic root of 131924647 is about 509.0674320081.

The spelling of 131924647 in words is "one hundred thirty-one million, nine hundred twenty-four thousand, six hundred forty-seven".