131902789 has 4 divisors (see below), whose sum is σ = 131949100. Its totient is φ = 131856480.

The previous prime is 131902763. The next prime is 131902843. The reversal of 131902789 is 987209131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987209131 = 8389 ⋅117679.

It can be written as a sum of positive squares in 2 ways, for example, as 40068900 + 91833889 = 6330^2 + 9583^2 .

It is a cyclic number.

It is not a de Polignac number, because 131902789 - 2¹³ = 131894597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131902889) 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, 18582 + ... + 24679.

It is an arithmetic number, because the mean of its divisors is an integer number (32987275).

Almost surely, 2^131902789 is an apocalyptic number.

It is an amenable number.

131902789 is a deficient number, since it is larger than the sum of its proper divisors (46311).

131902789 is an equidigital number, since it uses as much as digits as its factorization.

131902789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46310.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 131902789 is about 11484.8939481390. The cubic root of 131902789 is about 509.0393154260.

The spelling of 131902789 in words is "one hundred thirty-one million, nine hundred two thousand, seven hundred eighty-nine".