539073921 has 4 divisors (see below), whose sum is σ = 718765232. Its totient is φ = 359382612.

The previous prime is 539073917. The next prime is 539073937. The reversal of 539073921 is 129370935.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 539073921 - 2² = 539073917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 539073921.

It is not an unprimeable number, because it can be changed into a prime (539073901) 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, 89845651 + ... + 89845656.

It is an arithmetic number, because the mean of its divisors is an integer number (179691308).

Almost surely, 2^539073921 is an apocalyptic number.

It is an amenable number.

539073921 is a deficient number, since it is larger than the sum of its proper divisors (179691311).

539073921 is a wasteful number, since it uses less digits than its factorization.

539073921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179691310.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 539073921 is about 23217.9654793438. The cubic root of 539073921 is about 813.8595065478.

The spelling of 539073921 in words is "five hundred thirty-nine million, seventy-three thousand, nine hundred twenty-one".