1439029973 has 4 divisors (see below), whose sum is σ = 1469647680. Its totient is φ = 1408412268.

The previous prime is 1439029939. The next prime is 1439029981. The reversal of 1439029973 is 3799209341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1439029973 - 2¹⁶ = 1438964437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 30617659 = 1439029973 / (1 + 4 + 3 + 9 + 0 + 2 + 9 + 9 + 7 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1439029993) 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, 15308783 + ... + 15308876.

It is an arithmetic number, because the mean of its divisors is an integer number (367411920).

Almost surely, 2^1439029973 is an apocalyptic number.

It is an amenable number.

1439029973 is a deficient number, since it is larger than the sum of its proper divisors (30617707).

1439029973 is an equidigital number, since it uses as much as digits as its factorization.

1439029973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30617706.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 1439029973 is about 37934.5485408750. The cubic root of 1439029973 is about 1128.9896137121.

The spelling of 1439029973 in words is "one billion, four hundred thirty-nine million, twenty-nine thousand, nine hundred seventy-three".