131898469 has 4 divisors (see below), whose sum is σ = 131923296. Its totient is φ = 131873644.

The previous prime is 131898463. The next prime is 131898493. The reversal of 131898469 is 964898131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 964898131 = 24421 ⋅39511.

It is a cyclic number.

It is not a de Polignac number, because 131898469 - 2²¹ = 129801317 is a prime.

It is a super-2 number, since 2×131898469² = 34794412249087922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131898463) 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, 859 + ... + 16264.

It is an arithmetic number, because the mean of its divisors is an integer number (32980824).

Almost surely, 2^131898469 is an apocalyptic number.

It is an amenable number.

131898469 is a deficient number, since it is larger than the sum of its proper divisors (24827).

131898469 is an equidigital number, since it uses as much as digits as its factorization.

131898469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24826.

The product of its digits is 373248, while the sum is 49.

The square root of 131898469 is about 11484.7058734649. The cubic root of 131898469 is about 509.0337581165.

The spelling of 131898469 in words is "one hundred thirty-one million, eight hundred ninety-eight thousand, four hundred sixty-nine".