53404403 has 8 divisors (see below), whose sum is σ = 57766800. Its totient is φ = 49078368.

The previous prime is 53404397. The next prime is 53404423. The reversal of 53404403 is 30440435.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53404403 - 2⁴ = 53404387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53404423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5993 + ... + 11946.

It is an arithmetic number, because the mean of its divisors is an integer number (7220850).

Almost surely, 2^53404403 is an apocalyptic number.

53404403 is a deficient number, since it is larger than the sum of its proper divisors (4362397).

53404403 is a wasteful number, since it uses less digits than its factorization.

53404403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18181.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 53404403 is about 7307.8316209393. The cubic root of 53404403 is about 376.5815351328.

Adding to 53404403 its reverse (30440435), we get a palindrome (83844838).

The spelling of 53404403 in words is "fifty-three million, four hundred four thousand, four hundred three".