542890349 has 4 divisors (see below), whose sum is σ = 544428636. Its totient is φ = 541352064.

The previous prime is 542890319. The next prime is 542890357. The reversal of 542890349 is 943098245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 943098245 = 5 ⋅188619649.

It can be written as a sum of positive squares in 2 ways, for example, as 344362249 + 198528100 = 18557^2 + 14090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542890349 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 (542890319) 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, 768614 + ... + 769319.

It is an arithmetic number, because the mean of its divisors is an integer number (136107159).

Almost surely, 2^542890349 is an apocalyptic number.

It is an amenable number.

542890349 is a deficient number, since it is larger than the sum of its proper divisors (1538287).

542890349 is a wasteful number, since it uses less digits than its factorization.

542890349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538286.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 542890349 is about 23300.0074892692. The cubic root of 542890349 is about 815.7755919861.

The spelling of 542890349 in words is "five hundred forty-two million, eight hundred ninety thousand, three hundred forty-nine".