131940899 has 4 divisors (see below), whose sum is σ = 135009336. Its totient is φ = 128872464.

The previous prime is 131940877. The next prime is 131940901. The reversal of 131940899 is 998049131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998049131 = 389 ⋅2565679.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131940899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131949899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534154 + ... + 1534239.

It is an arithmetic number, because the mean of its divisors is an integer number (33752334).

Almost surely, 2^131940899 is an apocalyptic number.

131940899 is a deficient number, since it is larger than the sum of its proper divisors (3068437).

131940899 is an equidigital number, since it uses as much as digits as its factorization.

131940899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068436.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 131940899 is about 11486.5529642273. The cubic root of 131940899 is about 509.0883354162.

The spelling of 131940899 in words is "one hundred thirty-one million, nine hundred forty thousand, eight hundred ninety-nine".