1325731623 has 4 divisors (see below), whose sum is σ = 1767642168. Its totient is φ = 883821080.

The previous prime is 1325731591. The next prime is 1325731651. The reversal of 1325731623 is 3261375231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1325731623 - 2⁵ = 1325731591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325731663) 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, 220955268 + ... + 220955273.

It is an arithmetic number, because the mean of its divisors is an integer number (441910542).

Almost surely, 2^1325731623 is an apocalyptic number.

1325731623 is a deficient number, since it is larger than the sum of its proper divisors (441910545).

1325731623 is an equidigital number, since it uses as much as digits as its factorization.

1325731623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441910544.

The product of its digits is 22680, while the sum is 33.

The square root of 1325731623 is about 36410.5976743036. The cubic root of 1325731623 is about 1098.5467373445.

The spelling of 1325731623 in words is "one billion, three hundred twenty-five million, seven hundred thirty-one thousand, six hundred twenty-three".