1299427379 has 2 divisors, whose sum is σ = 1299427380. Its totient is φ = 1299427378.

The previous prime is 1299427369. The next prime is 1299427397. The reversal of 1299427379 is 9737249921.

Together with next prime (1299427397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1299427379 - 2⁸ = 1299427123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1299427379.

It is not a weakly prime, because it can be changed into another prime (1299427319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649713689 + 649713690.

It is an arithmetic number, because the mean of its divisors is an integer number (649713690).

Almost surely, 2^1299427379 is an apocalyptic number.

1299427379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299427379 is an equidigital number, since it uses as much as digits as its factorization.

1299427379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 53.

The square root of 1299427379 is about 36047.5710554817. The cubic root of 1299427379 is about 1091.2326147878.

The spelling of 1299427379 in words is "one billion, two hundred ninety-nine million, four hundred twenty-seven thousand, three hundred seventy-nine".