1563857479 has 2 divisors, whose sum is σ = 1563857480. Its totient is φ = 1563857478.

The previous prime is 1563857473. The next prime is 1563857501. The reversal of 1563857479 is 9747583651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1563857479 - 2¹⁵ = 1563824711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1563857473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781928739 + 781928740.

It is an arithmetic number, because the mean of its divisors is an integer number (781928740).

Almost surely, 2^1563857479 is an apocalyptic number.

1563857479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563857479 is an equidigital number, since it uses as much as digits as its factorization.

1563857479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 55.

The square root of 1563857479 is about 39545.6379263251. The cubic root of 1563857479 is about 1160.7331569657.

The spelling of 1563857479 in words is "one billion, five hundred sixty-three million, eight hundred fifty-seven thousand, four hundred seventy-nine".