921275723 has 2 divisors, whose sum is σ = 921275724. Its totient is φ = 921275722.

The previous prime is 921275669. The next prime is 921275753. The reversal of 921275723 is 327572129.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921275723 is a prime.

It is not a weakly prime, because it can be changed into another prime (921275753) 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, 460637861 + 460637862.

It is an arithmetic number, because the mean of its divisors is an integer number (460637862).

Almost surely, 2^921275723 is an apocalyptic number.

921275723 is a deficient number, since it is larger than the sum of its proper divisors (1).

921275723 is an equidigital number, since it uses as much as digits as its factorization.

921275723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 921275723 is about 30352.5241619210. The cubic root of 921275723 is about 973.0381671164.

The spelling of 921275723 in words is "nine hundred twenty-one million, two hundred seventy-five thousand, seven hundred twenty-three".