52378993 has 4 divisors (see below), whose sum is σ = 52496100. Its totient is φ = 52261888.

The previous prime is 52378987. The next prime is 52379039. The reversal of 52378993 is 39987325.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10284849 + 42094144 = 3207^2 + 6488^2 .

It is a cyclic number.

It is not a de Polignac number, because 52378993 - 2⁹ = 52378481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52378943) 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, 57880 + ... + 58777.

It is an arithmetic number, because the mean of its divisors is an integer number (13124025).

Almost surely, 2^52378993 is an apocalyptic number.

It is an amenable number.

52378993 is a deficient number, since it is larger than the sum of its proper divisors (117107).

52378993 is a wasteful number, since it uses less digits than its factorization.

52378993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117106.

The product of its digits is 408240, while the sum is 46.

The square root of 52378993 is about 7237.3332795996. Note that the first 3 decimals coincide. The cubic root of 52378993 is about 374.1557136116.

The spelling of 52378993 in words is "fifty-two million, three hundred seventy-eight thousand, nine hundred ninety-three".