1239954013 has 2 divisors, whose sum is σ = 1239954014. Its totient is φ = 1239954012.

The previous prime is 1239953993. The next prime is 1239954017. The reversal of 1239954013 is 3104599321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 754985529 + 484968484 = 27477^2 + 22022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1239954013 - 2²⁵ = 1206399581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239954017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619977006 + 619977007.

It is an arithmetic number, because the mean of its divisors is an integer number (619977007).

Almost surely, 2^1239954013 is an apocalyptic number.

It is an amenable number.

1239954013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239954013 is an equidigital number, since it uses as much as digits as its factorization.

1239954013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 1239954013 is about 35212.9807457420. The cubic root of 1239954013 is about 1074.3237897659.

The spelling of 1239954013 in words is "one billion, two hundred thirty-nine million, nine hundred fifty-four thousand, thirteen".