52447939 has 4 divisors (see below), whose sum is σ = 54139840. Its totient is φ = 50756040.

The previous prime is 52447931. The next prime is 52447957. The reversal of 52447939 is 93974425.

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 52447939 - 2³ = 52447931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52447895 and 52447904.

It is not an unprimeable number, because it can be changed into a prime (52447931) 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, 845904 + ... + 845965.

It is an arithmetic number, because the mean of its divisors is an integer number (13534960).

Almost surely, 2^52447939 is an apocalyptic number.

52447939 is a deficient number, since it is larger than the sum of its proper divisors (1691901).

52447939 is a wasteful number, since it uses less digits than its factorization.

52447939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691900.

The product of its digits is 272160, while the sum is 43.

The square root of 52447939 is about 7242.0949317169. The cubic root of 52447939 is about 374.3198075739.

The spelling of 52447939 in words is "fifty-two million, four hundred forty-seven thousand, nine hundred thirty-nine".