52478791 has 4 divisors (see below), whose sum is σ = 53699272. Its totient is φ = 51258312.

The previous prime is 52478749. The next prime is 52478819. The reversal of 52478791 is 19787425.

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 52478791 - 2¹⁷ = 52347719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1220437 = 52478791 / (5 + 2 + 4 + 7 + 8 + 7 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52476791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610176 + ... + 610261.

It is an arithmetic number, because the mean of its divisors is an integer number (13424818).

Almost surely, 2^52478791 is an apocalyptic number.

52478791 is a deficient number, since it is larger than the sum of its proper divisors (1220481).

52478791 is a wasteful number, since it uses less digits than its factorization.

52478791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220480.

The product of its digits is 141120, while the sum is 43.

The square root of 52478791 is about 7244.2246652075. The cubic root of 52478791 is about 374.3931898728.

The spelling of 52478791 in words is "fifty-two million, four hundred seventy-eight thousand, seven hundred ninety-one".