52539947 has 4 divisors (see below), whose sum is σ = 54234816. Its totient is φ = 50845080.

The previous prime is 52539941. The next prime is 52539973. The reversal of 52539947 is 74993525.

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

It is a cyclic number.

It is not a de Polignac number, because 52539947 - 2⁸ = 52539691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52539898 and 52539907.

It is not an unprimeable number, because it can be changed into a prime (52539941) 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, 847388 + ... + 847449.

It is an arithmetic number, because the mean of its divisors is an integer number (13558704).

Almost surely, 2^52539947 is an apocalyptic number.

52539947 is a deficient number, since it is larger than the sum of its proper divisors (1694869).

52539947 is a wasteful number, since it uses less digits than its factorization.

52539947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694868.

The product of its digits is 340200, while the sum is 44.

The square root of 52539947 is about 7248.4444538121. Note that the first 4 decimals coincide. The cubic root of 52539947 is about 374.5385660725.

The spelling of 52539947 in words is "fifty-two million, five hundred thirty-nine thousand, nine hundred forty-seven".