1479719981 has 4 divisors (see below), whose sum is σ = 1557600000. Its totient is φ = 1401839964.

The previous prime is 1479719977. The next prime is 1479719987. The reversal of 1479719981 is 1899179741.

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 1479719981 - 2² = 1479719977 is a prime.

It is a super-2 number, since 2×1479719981² = 4379142444341280722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1479719987) 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, 38939981 + ... + 38940018.

It is an arithmetic number, because the mean of its divisors is an integer number (389400000).

Almost surely, 2^1479719981 is an apocalyptic number.

It is an amenable number.

1479719981 is a deficient number, since it is larger than the sum of its proper divisors (77880019).

1479719981 is an equidigital number, since it uses as much as digits as its factorization.

1479719981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77880018.

The product of its digits is 1143072, while the sum is 56.

The square root of 1479719981 is about 38467.1285775271. The cubic root of 1479719981 is about 1139.5319667421.

The spelling of 1479719981 in words is "one billion, four hundred seventy-nine million, seven hundred nineteen thousand, nine hundred eighty-one".