131694645 has 16 divisors (see below), whose sum is σ = 210888000. Its totient is φ = 70178304.

The previous prime is 131694613. The next prime is 131694649. The reversal of 131694645 is 546496131.

It is not a de Polignac number, because 131694645 - 2⁵ = 131694613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131694649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19557 + ... + 25413.

It is an arithmetic number, because the mean of its divisors is an integer number (13180500).

Almost surely, 2^131694645 is an apocalyptic number.

131694645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131694645 is a deficient number, since it is larger than the sum of its proper divisors (79193355).

131694645 is a wasteful number, since it uses less digits than its factorization.

131694645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7364.

The product of its digits is 77760, while the sum is 39.

The square root of 131694645 is about 11475.8287282444. The cubic root of 131694645 is about 508.7714179820.

The spelling of 131694645 in words is "one hundred thirty-one million, six hundred ninety-four thousand, six hundred forty-five".