299664397 has 2 divisors, whose sum is σ = 299664398. Its totient is φ = 299664396.

The previous prime is 299664353. The next prime is 299664403. The reversal of 299664397 is 793466992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297010756 + 2653641 = 17234^2 + 1629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-299664397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (299664317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149832198 + 149832199.

It is an arithmetic number, because the mean of its divisors is an integer number (149832199).

Almost surely, 2^299664397 is an apocalyptic number.

It is an amenable number.

299664397 is a deficient number, since it is larger than the sum of its proper divisors (1).

299664397 is an equidigital number, since it uses as much as digits as its factorization.

299664397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 55.

The square root of 299664397 is about 17310.8173406110. The cubic root of 299664397 is about 669.1832306002.

The spelling of 299664397 in words is "two hundred ninety-nine million, six hundred sixty-four thousand, three hundred ninety-seven".