131670381 has 8 divisors (see below), whose sum is σ = 175701664. Its totient is φ = 87709680.

The previous prime is 131670379. The next prime is 131670401. The reversal of 131670381 is 183076131.

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

It is not a de Polignac number, because 131670381 - 2¹ = 131670379 is a prime.

It is a super-2 number, since 2×131670381² = 34674178465370322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131670181) 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, 13126 + ... + 20871.

It is an arithmetic number, because the mean of its divisors is an integer number (21962708).

Almost surely, 2^131670381 is an apocalyptic number.

It is an amenable number.

131670381 is a deficient number, since it is larger than the sum of its proper divisors (44031283).

131670381 is a wasteful number, since it uses less digits than its factorization.

131670381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35291.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 131670381 is about 11474.7715009930. The cubic root of 131670381 is about 508.7401699691.

The spelling of 131670381 in words is "one hundred thirty-one million, six hundred seventy thousand, three hundred eighty-one".