542869939 has 2 divisors, whose sum is σ = 542869940. Its totient is φ = 542869938.

The previous prime is 542869907. The next prime is 542869949. The reversal of 542869939 is 939968245.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542869939 - 2⁵ = 542869907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542869939.

It is not a weakly prime, because it can be changed into another prime (542869949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271434969 + 271434970.

It is an arithmetic number, because the mean of its divisors is an integer number (271434970).

Almost surely, 2^542869939 is an apocalyptic number.

542869939 is a deficient number, since it is larger than the sum of its proper divisors (1).

542869939 is an equidigital number, since it uses as much as digits as its factorization.

542869939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 55.

The square root of 542869939 is about 23299.5695024608. The cubic root of 542869939 is about 815.7653688115.

The spelling of 542869939 in words is "five hundred forty-two million, eight hundred sixty-nine thousand, nine hundred thirty-nine".