1642727423 has 2 divisors, whose sum is σ = 1642727424. Its totient is φ = 1642727422.

The previous prime is 1642727419. The next prime is 1642727447. The reversal of 1642727423 is 3247272461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1642727423 - 2² = 1642727419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642727453) 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 as a sum of consecutive naturals, namely, 821363711 + 821363712.

It is an arithmetic number, because the mean of its divisors is an integer number (821363712).

Almost surely, 2^1642727423 is an apocalyptic number.

1642727423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642727423 is an equidigital number, since it uses as much as digits as its factorization.

1642727423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 38.

The square root of 1642727423 is about 40530.5739288256. The cubic root of 1642727423 is about 1179.9270813410.

Adding to 1642727423 its reverse (3247272461), we get a palindrome (4889999884).

The spelling of 1642727423 in words is "one billion, six hundred forty-two million, seven hundred twenty-seven thousand, four hundred twenty-three".