131461999 has 8 divisors (see below), whose sum is σ = 135158400. Its totient is φ = 127773216.

The previous prime is 131461963. The next prime is 131462021. The reversal of 131461999 is 999164131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131461999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131461919) 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, 66477 + ... + 68425.

It is an arithmetic number, because the mean of its divisors is an integer number (16894800).

Almost surely, 2^131461999 is an apocalyptic number.

131461999 is a deficient number, since it is larger than the sum of its proper divisors (3696401).

131461999 is a wasteful number, since it uses less digits than its factorization.

131461999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3809.

The product of its digits is 52488, while the sum is 43.

The square root of 131461999 is about 11465.6878991188. The cubic root of 131461999 is about 508.4716502821.

The spelling of 131461999 in words is "one hundred thirty-one million, four hundred sixty-one thousand, nine hundred ninety-nine".