1399599449 has 2 divisors, whose sum is σ = 1399599450. Its totient is φ = 1399599448.

The previous prime is 1399599431. The next prime is 1399599469. The reversal of 1399599449 is 9449959931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1395769600 + 3829849 = 37360^2 + 1957^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399599449 - 2²⁰ = 1398550873 is a prime.

It is a super-2 number, since 2×1399599449² = 3917757235282207202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1399599391 and 1399599400.

It is not a weakly prime, because it can be changed into another prime (1399599419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699799724 + 699799725.

It is an arithmetic number, because the mean of its divisors is an integer number (699799725).

Almost surely, 2^1399599449 is an apocalyptic number.

It is an amenable number.

1399599449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399599449 is an equidigital number, since it uses as much as digits as its factorization.

1399599449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14171760, while the sum is 62.

The square root of 1399599449 is about 37411.2208969448. The cubic root of 1399599449 is about 1118.5822433396.

The spelling of 1399599449 in words is "one billion, three hundred ninety-nine million, five hundred ninety-nine thousand, four hundred forty-nine".