1642434523 has 2 divisors, whose sum is σ = 1642434524. Its totient is φ = 1642434522.

The previous prime is 1642434511. The next prime is 1642434533. The reversal of 1642434523 is 3254342461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642434523 - 2⁵ = 1642434491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1642434503) 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, 821217261 + 821217262.

It is an arithmetic number, because the mean of its divisors is an integer number (821217262).

Almost surely, 2^1642434523 is an apocalyptic number.

1642434523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642434523 is an equidigital number, since it uses as much as digits as its factorization.

1642434523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 34.

The square root of 1642434523 is about 40526.9604461030. The cubic root of 1642434523 is about 1179.8569497660.

Adding to 1642434523 its reverse (3254342461), we get a palindrome (4896776984).

The spelling of 1642434523 in words is "one billion, six hundred forty-two million, four hundred thirty-four thousand, five hundred twenty-three".