1429905439 has 4 divisors (see below), whose sum is σ = 1505163640. Its totient is φ = 1354647240.

The previous prime is 1429905437. The next prime is 1429905443. The reversal of 1429905439 is 9345099241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9345099241 = 25463 ⋅367007.

It is a cyclic number.

It is not a de Polignac number, because 1429905439 - 2¹ = 1429905437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1429905437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37629072 + ... + 37629109.

It is an arithmetic number, because the mean of its divisors is an integer number (376290910).

Almost surely, 2^1429905439 is an apocalyptic number.

1429905439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1429905439 is a deficient number, since it is larger than the sum of its proper divisors (75258201).

1429905439 is an equidigital number, since it uses as much as digits as its factorization.

1429905439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75258200.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 1429905439 is about 37814.0904822528. The cubic root of 1429905439 is about 1126.5983375439.

It can be divided in two parts, 14299054 and 39, that multiplied together give a triangular number (557663106 = T₃₃₃₉₆).

The spelling of 1429905439 in words is "one billion, four hundred twenty-nine million, nine hundred five thousand, four hundred thirty-nine".