542635979 has 2 divisors, whose sum is σ = 542635980. Its totient is φ = 542635978.

The previous prime is 542635967. The next prime is 542635993. The reversal of 542635979 is 979536245.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 542635979 - 2¹⁶ = 542570443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (542635949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271317989 + 271317990.

It is an arithmetic number, because the mean of its divisors is an integer number (271317990).

Almost surely, 2^542635979 is an apocalyptic number.

542635979 is a deficient number, since it is larger than the sum of its proper divisors (1).

542635979 is an equidigital number, since it uses as much as digits as its factorization.

542635979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 50.

The square root of 542635979 is about 23294.5482677815. The cubic root of 542635979 is about 815.6481621682.

The spelling of 542635979 in words is "five hundred forty-two million, six hundred thirty-five thousand, nine hundred seventy-nine".