1306849399 has 2 divisors, whose sum is σ = 1306849400. Its totient is φ = 1306849398.

The previous prime is 1306849343. The next prime is 1306849409. The reversal of 1306849399 is 9939486031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1306849399 - 2¹¹ = 1306847351 is a prime.

It is a super-2 number, since 2×1306849399² = 3415710703333322402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306849309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653424699 + 653424700.

It is an arithmetic number, because the mean of its divisors is an integer number (653424700).

Almost surely, 2^1306849399 is an apocalyptic number.

1306849399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306849399 is an equidigital number, since it uses as much as digits as its factorization.

1306849399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 1306849399 is about 36150.3720451118. The cubic root of 1306849399 is about 1093.3062920162.

The spelling of 1306849399 in words is "one billion, three hundred six million, eight hundred forty-nine thousand, three hundred ninety-nine".