1439768977 has 4 divisors (see below), whose sum is σ = 1440267840. Its totient is φ = 1439270116.

The previous prime is 1439768951. The next prime is 1439769007. The reversal of 1439768977 is 7798679341.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7798679341 = 5839 ⋅1335619.

It is a cyclic number.

It is not a de Polignac number, because 1439768977 - 2⁷ = 1439768849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1439768677) 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 in 3 ways as a sum of consecutive naturals, for example, 245077 + ... + 250882.

It is an arithmetic number, because the mean of its divisors is an integer number (360066960).

Almost surely, 2^1439768977 is an apocalyptic number.

It is an amenable number.

1439768977 is a deficient number, since it is larger than the sum of its proper divisors (498863).

1439768977 is an equidigital number, since it uses as much as digits as its factorization.

1439768977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498862.

The product of its digits is 16003008, while the sum is 61.

The square root of 1439768977 is about 37944.2878046222. The cubic root of 1439768977 is about 1129.1828422701.

The spelling of 1439768977 in words is "one billion, four hundred thirty-nine million, seven hundred sixty-eight thousand, nine hundred seventy-seven".