131436433 has 4 divisors (see below), whose sum is σ = 138354160. Its totient is φ = 124518708.

The previous prime is 131436419. The next prime is 131436443. The reversal of 131436433 is 334634131.

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: 334634131 = 13 ⋅25741087.

It is a cyclic number.

It is not a de Polignac number, because 131436433 - 2⁹ = 131435921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131436443) 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, 3458835 + ... + 3458872.

It is an arithmetic number, because the mean of its divisors is an integer number (34588540).

Almost surely, 2^131436433 is an apocalyptic number.

It is an amenable number.

131436433 is a deficient number, since it is larger than the sum of its proper divisors (6917727).

131436433 is an equidigital number, since it uses as much as digits as its factorization.

131436433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6917726.

The product of its digits is 7776, while the sum is 28.

The square root of 131436433 is about 11464.5729532329. The cubic root of 131436433 is about 508.4386865636.

The spelling of 131436433 in words is "one hundred thirty-one million, four hundred thirty-six thousand, four hundred thirty-three".