53621717 has 4 divisors (see below), whose sum is σ = 55953120. Its totient is φ = 51290316.

The previous prime is 53621707. The next prime is 53621719. The reversal of 53621717 is 71712635.

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 a cyclic number.

It is not a de Polignac number, because 53621717 - 2⁸ = 53621461 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 (53621719) 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, 1165667 + ... + 1165712.

It is an arithmetic number, because the mean of its divisors is an integer number (13988280).

Almost surely, 2^53621717 is an apocalyptic number.

It is an amenable number.

53621717 is a deficient number, since it is larger than the sum of its proper divisors (2331403).

53621717 is a wasteful number, since it uses less digits than its factorization.

53621717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331402.

The product of its digits is 8820, while the sum is 32.

The square root of 53621717 is about 7322.6850949635. The cubic root of 53621717 is about 377.0916409295.

The spelling of 53621717 in words is "fifty-three million, six hundred twenty-one thousand, seven hundred seventeen".