1299340387 has 2 divisors, whose sum is σ = 1299340388. Its totient is φ = 1299340386.

The previous prime is 1299340363. The next prime is 1299340409. The reversal of 1299340387 is 7830439921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1299340387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1299340337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649670193 + 649670194.

It is an arithmetic number, because the mean of its divisors is an integer number (649670194).

Almost surely, 2^1299340387 is an apocalyptic number.

1299340387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299340387 is an equidigital number, since it uses as much as digits as its factorization.

1299340387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 1299340387 is about 36046.3644075238. The cubic root of 1299340387 is about 1091.2082628751.

The spelling of 1299340387 in words is "one billion, two hundred ninety-nine million, three hundred forty thousand, three hundred eighty-seven".