1269939668 has 12 divisors (see below), whose sum is σ = 2223697812. Its totient is φ = 634597440.

The previous prime is 1269939653. The next prime is 1269939751. The reversal of 1269939668 is 8669399621.

It can be written as a sum of positive squares in 2 ways, for example, as 770506564 + 499433104 = 27758^2 + 22348^2 .

It is a super-2 number, since 2×1269939668² = 3225493520719900448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85355 + ... + 99122.

It is an arithmetic number, because the mean of its divisors is an integer number (185308151).

Almost surely, 2^1269939668 is an apocalyptic number.

It is an amenable number.

1269939668 is a deficient number, since it is larger than the sum of its proper divisors (953758144).

1269939668 is a wasteful number, since it uses less digits than its factorization.

1269939668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186202 (or 186200 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 59.

The square root of 1269939668 is about 35636.2128739854. The cubic root of 1269939668 is about 1082.9149841454.

The spelling of 1269939668 in words is "one billion, two hundred sixty-nine million, nine hundred thirty-nine thousand, six hundred sixty-eight".