131675721 has 8 divisors (see below), whose sum is σ = 177972960. Its totient is φ = 86581152.

The previous prime is 131675683. The next prime is 131675729. The reversal of 131675721 is 127576131.

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

It is not a de Polignac number, because 131675721 - 2¹⁷ = 131544649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131675729) 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, 300411 + ... + 300848.

It is an arithmetic number, because the mean of its divisors is an integer number (22246620).

Almost surely, 2^131675721 is an apocalyptic number.

It is an amenable number.

131675721 is a deficient number, since it is larger than the sum of its proper divisors (46297239).

131675721 is an equidigital number, since it uses as much as digits as its factorization.

131675721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601335.

The product of its digits is 8820, while the sum is 33.

The square root of 131675721 is about 11475.0041830058. The cubic root of 131675721 is about 508.7470473340.

The spelling of 131675721 in words is "one hundred thirty-one million, six hundred seventy-five thousand, seven hundred twenty-one".