1538479477 has 8 divisors (see below), whose sum is σ = 1546248600. Its totient is φ = 1530729984.

The previous prime is 1538479471. The next prime is 1538479487. The reversal of 1538479477 is 7749748351.

It can be written as a sum of positive squares in 4 ways, for example, as 298805796 + 1239673681 = 17286^2 + 35209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1538479477 - 2³ = 1538479469 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 (1538479471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167049 + ... + 176017.

It is an arithmetic number, because the mean of its divisors is an integer number (193281075).

Almost surely, 2^1538479477 is an apocalyptic number.

It is an amenable number.

1538479477 is a deficient number, since it is larger than the sum of its proper divisors (7769123).

1538479477 is an equidigital number, since it uses as much as digits as its factorization.

1538479477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815.

The product of its digits is 5927040, while the sum is 55.

The square root of 1538479477 is about 39223.4556993644. The cubic root of 1538479477 is about 1154.4201600950.

The spelling of 1538479477 in words is "one billion, five hundred thirty-eight million, four hundred seventy-nine thousand, four hundred seventy-seven".