1638542383 has 2 divisors, whose sum is σ = 1638542384. Its totient is φ = 1638542382.

The previous prime is 1638542363. The next prime is 1638542393. The reversal of 1638542383 is 3832458361.

It is a strong prime.

It is an emirp because it is prime and its reverse (3832458361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1638542383 is a prime.

It is a super-2 number, since 2×1638542383² = 5369642281774637378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1638542363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819271191 + 819271192.

It is an arithmetic number, because the mean of its divisors is an integer number (819271192).

Almost surely, 2^1638542383 is an apocalyptic number.

1638542383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1638542383 is an equidigital number, since it uses as much as digits as its factorization.

1638542383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 43.

The square root of 1638542383 is about 40478.9128188987. The cubic root of 1638542383 is about 1178.9242285404.

The spelling of 1638542383 in words is "one billion, six hundred thirty-eight million, five hundred forty-two thousand, three hundred eighty-three".