1642222499 has 2 divisors, whose sum is σ = 1642222500. Its totient is φ = 1642222498.

The previous prime is 1642222451. The next prime is 1642222501. The reversal of 1642222499 is 9942222461.

It is a strong prime.

It is an emirp because it is prime and its reverse (9942222461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1642222499 - 2⁸ = 1642222243 is a prime.

Together with 1642222501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1642222429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821111249 + 821111250.

It is an arithmetic number, because the mean of its divisors is an integer number (821111250).

Almost surely, 2^1642222499 is an apocalyptic number.

1642222499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642222499 is an equidigital number, since it uses as much as digits as its factorization.

1642222499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 1642222499 is about 40524.3445227680. The cubic root of 1642222499 is about 1179.8061778272.

The spelling of 1642222499 in words is "one billion, six hundred forty-two million, two hundred twenty-two thousand, four hundred ninety-nine".