1538772479 has 4 divisors (see below), whose sum is σ = 1567805976. Its totient is φ = 1509738984.

The previous prime is 1538772449. The next prime is 1538772481. The reversal of 1538772479 is 9742778351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1538772479 - 2⁸ = 1538772223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 29033443 = 1538772479 / (1 + 5 + 3 + 8 + 7 + 7 + 2 + 4 + 7 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1538772479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538772449) 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, 14516669 + ... + 14516774.

It is an arithmetic number, because the mean of its divisors is an integer number (391951494).

Almost surely, 2^1538772479 is an apocalyptic number.

1538772479 is a deficient number, since it is larger than the sum of its proper divisors (29033497).

1538772479 is an equidigital number, since it uses as much as digits as its factorization.

1538772479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29033496.

The product of its digits is 2963520, while the sum is 53.

The square root of 1538772479 is about 39227.1905570613. The cubic root of 1538772479 is about 1154.4934415287.

The spelling of 1538772479 in words is "one billion, five hundred thirty-eight million, seven hundred seventy-two thousand, four hundred seventy-nine".