131403073 has 4 divisors (see below), whose sum is σ = 134608068. Its totient is φ = 128198080.

The previous prime is 131403049. The next prime is 131403091. The reversal of 131403073 is 370304131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 370304131 = 3931 ⋅94201.

It can be written as a sum of positive squares in 2 ways, for example, as 6589489 + 124813584 = 2567^2 + 11172^2 .

It is a cyclic number.

It is not a de Polignac number, because 131403073 - 2²¹ = 129305921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131403473) 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 3 ways as a sum of consecutive naturals, for example, 1602436 + ... + 1602517.

It is an arithmetic number, because the mean of its divisors is an integer number (33652017).

Almost surely, 2^131403073 is an apocalyptic number.

It is an amenable number.

131403073 is a deficient number, since it is larger than the sum of its proper divisors (3204995).

131403073 is an equidigital number, since it uses as much as digits as its factorization.

131403073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204994.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 131403073 is about 11463.1179440848. The cubic root of 131403073 is about 508.3956671627.

The spelling of 131403073 in words is "one hundred thirty-one million, four hundred three thousand, seventy-three".