53678321 has 4 divisors (see below), whose sum is σ = 53692992. Its totient is φ = 53663652.

The previous prime is 53678281. The next prime is 53678327. The reversal of 53678321 is 12387635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 53678321 - 2⁶ = 53678257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53678327) 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, 3140 + ... + 10826.

It is an arithmetic number, because the mean of its divisors is an integer number (13423248).

Almost surely, 2^53678321 is an apocalyptic number.

It is an amenable number.

53678321 is a deficient number, since it is larger than the sum of its proper divisors (14671).

53678321 is an equidigital number, since it uses as much as digits as its factorization.

53678321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14670.

The product of its digits is 30240, while the sum is 35.

The square root of 53678321 is about 7326.5490512246. The cubic root of 53678321 is about 377.2242823925.

The spelling of 53678321 in words is "fifty-three million, six hundred seventy-eight thousand, three hundred twenty-one".