131739945 has 16 divisors (see below), whose sum is σ = 211952832. Its totient is φ = 69871680.

The previous prime is 131739941. The next prime is 131739947. The reversal of 131739945 is 549937131.

It is not a de Polignac number, because 131739945 - 2² = 131739941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131739897 and 131739906.

It is not an unprimeable number, because it can be changed into a prime (131739941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21547 + ... + 26976.

It is an arithmetic number, because the mean of its divisors is an integer number (13247052).

Almost surely, 2^131739945 is an apocalyptic number.

131739945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131739945 is a deficient number, since it is larger than the sum of its proper divisors (80212887).

131739945 is a wasteful number, since it uses less digits than its factorization.

131739945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48712.

The product of its digits is 102060, while the sum is 42.

The square root of 131739945 is about 11477.8022722122. The cubic root of 131739945 is about 508.8297466082.

The spelling of 131739945 in words is "one hundred thirty-one million, seven hundred thirty-nine thousand, nine hundred forty-five".