131519723 has 4 divisors (see below), whose sum is σ = 131942928. Its totient is φ = 131096520.

The previous prime is 131519699. The next prime is 131519741. The reversal of 131519723 is 327915131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327915131 = 6221 ⋅52711.

It is a cyclic number.

It is not a de Polignac number, because 131519723 - 2¹² = 131515627 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 131519723.

It is not an unprimeable number, because it can be changed into a prime (131519743) 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, 211136 + ... + 211757.

It is an arithmetic number, because the mean of its divisors is an integer number (32985732).

Almost surely, 2^131519723 is an apocalyptic number.

131519723 is a deficient number, since it is larger than the sum of its proper divisors (423205).

131519723 is an equidigital number, since it uses as much as digits as its factorization.

131519723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423204.

The product of its digits is 5670, while the sum is 32.

The square root of 131519723 is about 11468.2048726032. The cubic root of 131519723 is about 508.5460614500.

The spelling of 131519723 in words is "one hundred thirty-one million, five hundred nineteen thousand, seven hundred twenty-three".