731125691 has 2 divisors, whose sum is σ = 731125692. Its totient is φ = 731125690.

The previous prime is 731125667. The next prime is 731125693. The reversal of 731125691 is 196521137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 731125691 - 2⁶ = 731125627 is a prime.

Together with 731125693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (731125693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365562845 + 365562846.

It is an arithmetic number, because the mean of its divisors is an integer number (365562846).

Almost surely, 2^731125691 is an apocalyptic number.

731125691 is a deficient number, since it is larger than the sum of its proper divisors (1).

731125691 is an equidigital number, since it uses as much as digits as its factorization.

731125691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The square root of 731125691 is about 27039.3359940661. The cubic root of 731125691 is about 900.8739210863.

The spelling of 731125691 in words is "seven hundred thirty-one million, one hundred twenty-five thousand, six hundred ninety-one".