1974842563 has 2 divisors, whose sum is σ = 1974842564. Its totient is φ = 1974842562.

The previous prime is 1974842557. The next prime is 1974842567. The reversal of 1974842563 is 3652484791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1974842563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1974842567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987421281 + 987421282.

It is an arithmetic number, because the mean of its divisors is an integer number (987421282).

Almost surely, 2^1974842563 is an apocalyptic number.

1974842563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974842563 is an equidigital number, since it uses as much as digits as its factorization.

1974842563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The square root of 1974842563 is about 44439.2007466381. The cubic root of 1974842563 is about 1254.6160130628.

The spelling of 1974842563 in words is "one billion, nine hundred seventy-four million, eight hundred forty-two thousand, five hundred sixty-three".