131637643 has 8 divisors (see below), whose sum is σ = 139939920. Its totient is φ = 123472800.

The previous prime is 131637619. The next prime is 131637661. The reversal of 131637643 is 346736131.

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 131637643 - 2⁹ = 131637131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131637599 and 131637608.

It is not an unprimeable number, because it can be changed into a prime (131637943) 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, 32380 + ... + 36217.

It is an arithmetic number, because the mean of its divisors is an integer number (17492490).

Almost surely, 2^131637643 is an apocalyptic number.

131637643 is a deficient number, since it is larger than the sum of its proper divisors (8302277).

131637643 is a wasteful number, since it uses less digits than its factorization.

131637643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68717.

The product of its digits is 27216, while the sum is 34.

The square root of 131637643 is about 11473.3448915301. The cubic root of 131637643 is about 508.6980027631.

The spelling of 131637643 in words is "one hundred thirty-one million, six hundred thirty-seven thousand, six hundred forty-three".