53645997 has 4 divisors (see below), whose sum is σ = 71528000. Its totient is φ = 35763996.

The previous prime is 53645989. The next prime is 53646001. The reversal of 53645997 is 79954635.

53645997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 53645997 - 2³ = 53645989 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 (53645957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8940997 + ... + 8941002.

It is an arithmetic number, because the mean of its divisors is an integer number (17882000).

Almost surely, 2^53645997 is an apocalyptic number.

It is an amenable number.

53645997 is a deficient number, since it is larger than the sum of its proper divisors (17882003).

53645997 is a wasteful number, since it uses less digits than its factorization.

53645997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17882002.

The product of its digits is 1020600, while the sum is 48.

The square root of 53645997 is about 7324.3427691500. The cubic root of 53645997 is about 377.1485482424.

The spelling of 53645997 in words is "fifty-three million, six hundred forty-five thousand, nine hundred ninety-seven".