539397791 has 4 divisors (see below), whose sum is σ = 540505872. Its totient is φ = 538289712.

The previous prime is 539397779. The next prime is 539397847. The reversal of 539397791 is 197793935.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197793935 = 5 ⋅39558787.

It is a cyclic number.

It is not a de Polignac number, because 539397791 - 2¹⁴ = 539381407 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 (539397091) 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, 553310 + ... + 554283.

It is an arithmetic number, because the mean of its divisors is an integer number (135126468).

Almost surely, 2^539397791 is an apocalyptic number.

539397791 is a deficient number, since it is larger than the sum of its proper divisors (1108081).

539397791 is a wasteful number, since it uses less digits than its factorization.

539397791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108080.

The product of its digits is 1607445, while the sum is 53.

The square root of 539397791 is about 23224.9389880792. The cubic root of 539397791 is about 814.0224600250.

The spelling of 539397791 in words is "five hundred thirty-nine million, three hundred ninety-seven thousand, seven hundred ninety-one".