1273688013 has 32 divisors (see below), whose sum is σ = 1859495680. Its totient is φ = 770757120.

The previous prime is 1273688011. The next prime is 1273688021. The reversal of 1273688013 is 3108863721.

It is not a de Polignac number, because 1273688013 - 2¹ = 1273688011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273688011) 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, 1796103 + ... + 1796811.

It is an arithmetic number, because the mean of its divisors is an integer number (58109240).

Almost surely, 2^1273688013 is an apocalyptic number.

1273688013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1273688013 is a deficient number, since it is larger than the sum of its proper divisors (585807667).

1273688013 is a wasteful number, since it uses less digits than its factorization.

1273688013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1273688013 is about 35688.7659215053. The cubic root of 1273688013 is about 1083.9793790302.

The spelling of 1273688013 in words is "one billion, two hundred seventy-three million, six hundred eighty-eight thousand, thirteen".