1264773979 has 32 divisors (see below), whose sum is σ = 1539901440. Its totient is φ = 1015483392.

The previous prime is 1264773943. The next prime is 1264774031. The reversal of 1264773979 is 9793774621.

It is not a de Polignac number, because 1264773979 - 2¹⁵ = 1264741211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264770979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1701882 + ... + 1702624.

It is an arithmetic number, because the mean of its divisors is an integer number (48121920).

Almost surely, 2^1264773979 is an apocalyptic number.

1264773979 is a deficient number, since it is larger than the sum of its proper divisors (275127461).

1264773979 is a wasteful number, since it uses less digits than its factorization.

1264773979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979.

The product of its digits is 4000752, while the sum is 55.

The square root of 1264773979 is about 35563.6609335991. The cubic root of 1264773979 is about 1081.4446770141. Note that the first 3 decimals are identical.

The spelling of 1264773979 in words is "one billion, two hundred sixty-four million, seven hundred seventy-three thousand, nine hundred seventy-nine".