542321999 has 2 divisors, whose sum is σ = 542322000. Its totient is φ = 542321998.

The previous prime is 542321993. The next prime is 542322007. The reversal of 542321999 is 999123245.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 542321999 - 2¹² = 542317903 is a prime.

It is a super-2 number, since 2×542321999² = 588226301198712002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542321993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271160999 + 271161000.

It is an arithmetic number, because the mean of its divisors is an integer number (271161000).

Almost surely, 2^542321999 is an apocalyptic number.

542321999 is a deficient number, since it is larger than the sum of its proper divisors (1).

542321999 is an equidigital number, since it uses as much as digits as its factorization.

542321999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 542321999 is about 23287.8079475076. The cubic root of 542321999 is about 815.4908150515.

The spelling of 542321999 in words is "five hundred forty-two million, three hundred twenty-one thousand, nine hundred ninety-nine".