1429999639 has 2 divisors, whose sum is σ = 1429999640. Its totient is φ = 1429999638.

The previous prime is 1429999609. The next prime is 1429999661. The reversal of 1429999639 is 9369999241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1429999639 - 2¹³ = 1429991447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1429999609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714999819 + 714999820.

It is an arithmetic number, because the mean of its divisors is an integer number (714999820).

Almost surely, 2^1429999639 is an apocalyptic number.

1429999639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1429999639 is an equidigital number, since it uses as much as digits as its factorization.

1429999639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8503056, while the sum is 61.

The square root of 1429999639 is about 37815.3360291827. The cubic root of 1429999639 is about 1126.6230765301.

The spelling of 1429999639 in words is "one billion, four hundred twenty-nine million, nine hundred ninety-nine thousand, six hundred thirty-nine".