1325723791 has 8 divisors (see below), whose sum is σ = 1515469824. Its totient is φ = 1136067000.

The previous prime is 1325723779. The next prime is 1325723827. The reversal of 1325723791 is 1973275231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1325723791 - 2⁹ = 1325723279 is a prime.

It is a super-3 number, since 3×1325723791³ (a number of 28 digits) contains 333 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 (1325723701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13326 + ... + 53188.

It is an arithmetic number, because the mean of its divisors is an integer number (189433728).

Almost surely, 2^1325723791 is an apocalyptic number.

1325723791 is a deficient number, since it is larger than the sum of its proper divisors (189746033).

1325723791 is an equidigital number, since it uses as much as digits as its factorization.

1325723791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44621.

The product of its digits is 79380, while the sum is 40.

The square root of 1325723791 is about 36410.4901230401. The cubic root of 1325723791 is about 1098.5445740522.

The spelling of 1325723791 in words is "one billion, three hundred twenty-five million, seven hundred twenty-three thousand, seven hundred ninety-one".