1264435723 has 2 divisors, whose sum is σ = 1264435724. Its totient is φ = 1264435722.

The previous prime is 1264435687. The next prime is 1264435751. The reversal of 1264435723 is 3275344621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264435723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264432723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632217861 + 632217862.

It is an arithmetic number, because the mean of its divisors is an integer number (632217862).

Almost surely, 2^1264435723 is an apocalyptic number.

1264435723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264435723 is an equidigital number, since it uses as much as digits as its factorization.

1264435723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 37.

The square root of 1264435723 is about 35558.9049747036. The cubic root of 1264435723 is about 1081.3482598486.

The spelling of 1264435723 in words is "one billion, two hundred sixty-four million, four hundred thirty-five thousand, seven hundred twenty-three".