53444399 has 4 divisors (see below), whose sum is σ = 54687336. Its totient is φ = 52201464.

The previous prime is 53444393. The next prime is 53444407. The reversal of 53444399 is 99344435.

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 53444399 - 2⁸ = 53444143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53444393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621404 + ... + 621489.

It is an arithmetic number, because the mean of its divisors is an integer number (13671834).

Almost surely, 2^53444399 is an apocalyptic number.

53444399 is a deficient number, since it is larger than the sum of its proper divisors (1242937).

53444399 is a wasteful number, since it uses less digits than its factorization.

53444399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242936.

The product of its digits is 233280, while the sum is 41.

The square root of 53444399 is about 7310.5676250206. The cubic root of 53444399 is about 376.6755223682.

The spelling of 53444399 in words is "fifty-three million, four hundred forty-four thousand, three hundred ninety-nine".