1273853999 has 6 divisors (see below), whose sum is σ = 1400186760. Its totient is φ = 1158048980.

The previous prime is 1273853981. The next prime is 1273854007. The reversal of 1273853999 is 9993583721.

It is a happy number.

It is not a de Polignac number, because 1273853999 - 2⁸ = 1273853743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273853909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5263739 + ... + 5263980.

It is an arithmetic number, because the mean of its divisors is an integer number (233364460).

Almost surely, 2^1273853999 is an apocalyptic number.

1273853999 is a deficient number, since it is larger than the sum of its proper divisors (126332761).

1273853999 is a wasteful number, since it uses less digits than its factorization.

1273853999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10527741 (or 10527730 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 56.

The square root of 1273853999 is about 35691.0913114183. The cubic root of 1273853999 is about 1084.0264647592.

The spelling of 1273853999 in words is "one billion, two hundred seventy-three million, eight hundred fifty-three thousand, nine hundred ninety-nine".