539891497 has 4 divisors (see below), whose sum is σ = 544844740. Its totient is φ = 534938256.

The previous prime is 539891467. The next prime is 539891501. The reversal of 539891497 is 794198935.

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 443144601 + 96746896 = 21051^2 + 9836^2 .

It is a cyclic number.

It is not a de Polignac number, because 539891497 - 2⁷ = 539891369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (539891467) 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, 2476458 + ... + 2476675.

It is an arithmetic number, because the mean of its divisors is an integer number (136211185).

Almost surely, 2^539891497 is an apocalyptic number.

It is an amenable number.

539891497 is a deficient number, since it is larger than the sum of its proper divisors (4953243).

539891497 is a wasteful number, since it uses less digits than its factorization.

539891497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953242.

The product of its digits is 2449440, while the sum is 55.

The square root of 539891497 is about 23235.5653471139. The cubic root of 539891497 is about 814.2707401297.

The spelling of 539891497 in words is "five hundred thirty-nine million, eight hundred ninety-one thousand, four hundred ninety-seven".