1642479859 has 2 divisors, whose sum is σ = 1642479860. Its totient is φ = 1642479858.

The previous prime is 1642479857. The next prime is 1642479889. The reversal of 1642479859 is 9589742461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1642479859 - 2¹ = 1642479857 is a prime.

Together with 1642479857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1642479857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821239929 + 821239930.

It is an arithmetic number, because the mean of its divisors is an integer number (821239930).

Almost surely, 2^1642479859 is an apocalyptic number.

1642479859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642479859 is an equidigital number, since it uses as much as digits as its factorization.

1642479859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 55.

The square root of 1642479859 is about 40527.5197736057. The cubic root of 1642479859 is about 1179.8678055012.

The spelling of 1642479859 in words is "one billion, six hundred forty-two million, four hundred seventy-nine thousand, eight hundred fifty-nine".