1264224779 has 2 divisors, whose sum is σ = 1264224780. Its totient is φ = 1264224778.

The previous prime is 1264224761. The next prime is 1264224799. The reversal of 1264224779 is 9774224621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1264224779 - 2⁸ = 1264224523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264224799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632112389 + 632112390.

It is an arithmetic number, because the mean of its divisors is an integer number (632112390).

Almost surely, 2^1264224779 is an apocalyptic number.

1264224779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264224779 is an equidigital number, since it uses as much as digits as its factorization.

1264224779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The square root of 1264224779 is about 35555.9387304006. The cubic root of 1264224779 is about 1081.2881232440.

The spelling of 1264224779 in words is "one billion, two hundred sixty-four million, two hundred twenty-four thousand, seven hundred seventy-nine".