1563139967 has 2 divisors, whose sum is σ = 1563139968. Its totient is φ = 1563139966.

The previous prime is 1563139957. The next prime is 1563140009. The reversal of 1563139967 is 7699313651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1563139967 - 2²⁴ = 1546362751 is a prime.

It is a super-2 number, since 2×1563139967² = 4886813112865522178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1563139957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781569983 + 781569984.

It is an arithmetic number, because the mean of its divisors is an integer number (781569984).

Almost surely, 2^1563139967 is an apocalyptic number.

1563139967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563139967 is an equidigital number, since it uses as much as digits as its factorization.

1563139967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 50.

The square root of 1563139967 is about 39536.5649367772. The cubic root of 1563139967 is about 1160.5556115086. Note that the first 3 decimals are identical.

The spelling of 1563139967 in words is "one billion, five hundred sixty-three million, one hundred thirty-nine thousand, nine hundred sixty-seven".