1279950823 has 2 divisors, whose sum is σ = 1279950824. Its totient is φ = 1279950822.

The previous prime is 1279950809. The next prime is 1279950853. The reversal of 1279950823 is 3280599721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1279950823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279950803) 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 as a sum of consecutive naturals, namely, 639975411 + 639975412.

It is an arithmetic number, because the mean of its divisors is an integer number (639975412).

Almost surely, 2^1279950823 is an apocalyptic number.

1279950823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279950823 is an equidigital number, since it uses as much as digits as its factorization.

1279950823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1279950823 is about 35776.4003639271. The cubic root of 1279950823 is about 1085.7531415729.

The spelling of 1279950823 in words is "one billion, two hundred seventy-nine million, nine hundred fifty thousand, eight hundred twenty-three".