131923961 has 8 divisors (see below), whose sum is σ = 150429384. Its totient is φ = 114612480.

The previous prime is 131923951. The next prime is 131923969. The reversal of 131923961 is 169329131.

It can be written as a sum of positive squares in 4 ways, for example, as 51265600 + 80658361 = 7160^2 + 8981^2 .

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 131923961 - 2¹⁴ = 131907577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131923969) 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, 298250 + ... + 298691.

It is an arithmetic number, because the mean of its divisors is an integer number (18803673).

Almost surely, 2^131923961 is an apocalyptic number.

It is an amenable number.

131923961 is a deficient number, since it is larger than the sum of its proper divisors (18505423).

131923961 is a wasteful number, since it uses less digits than its factorization.

131923961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596971.

The product of its digits is 8748, while the sum is 35.

The square root of 131923961 is about 11485.8156436537. The cubic root of 131923961 is about 509.0665496336.

The spelling of 131923961 in words is "one hundred thirty-one million, nine hundred twenty-three thousand, nine hundred sixty-one".