1239956479 has 2 divisors, whose sum is σ = 1239956480. Its totient is φ = 1239956478.

The previous prime is 1239956467. The next prime is 1239956503. The reversal of 1239956479 is 9746599321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1239956479 - 2⁵ = 1239956447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239956279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619978239 + 619978240.

It is an arithmetic number, because the mean of its divisors is an integer number (619978240).

Almost surely, 2^1239956479 is an apocalyptic number.

1239956479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239956479 is an equidigital number, since it uses as much as digits as its factorization.

1239956479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 55.

The square root of 1239956479 is about 35213.0157612210. The cubic root of 1239956479 is about 1074.3245019646.

The spelling of 1239956479 in words is "one billion, two hundred thirty-nine million, nine hundred fifty-six thousand, four hundred seventy-nine".