542943949 has 4 divisors (see below), whose sum is σ = 544311964. Its totient is φ = 541575936.

The previous prime is 542943941. The next prime is 542943959. The reversal of 542943949 is 949349245.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 444577225 + 98366724 = 21085^2 + 9918^2 .

It is a cyclic number.

It is not a de Polignac number, because 542943949 - 2³ = 542943941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542943941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683412 + ... + 684205.

It is an arithmetic number, because the mean of its divisors is an integer number (136077991).

Almost surely, 2^542943949 is an apocalyptic number.

It is an amenable number.

542943949 is a deficient number, since it is larger than the sum of its proper divisors (1368015).

542943949 is a wasteful number, since it uses less digits than its factorization.

542943949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368014.

The product of its digits is 1399680, while the sum is 49.

The square root of 542943949 is about 23301.1576751028. The cubic root of 542943949 is about 815.8024384957.

The spelling of 542943949 in words is "five hundred forty-two million, nine hundred forty-three thousand, nine hundred forty-nine".