53891663 has 8 divisors (see below), whose sum is σ = 61984032. Its totient is φ = 45897696.

The previous prime is 53891641. The next prime is 53891689. The reversal of 53891663 is 36619835.

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 53891663 - 2¹² = 53887567 is a prime.

It is a super-2 number, since 2×53891663² = 5808622681811138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53891663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53891633) 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, 23420 + ... + 25617.

It is an arithmetic number, because the mean of its divisors is an integer number (7748004).

Almost surely, 2^53891663 is an apocalyptic number.

53891663 is a deficient number, since it is larger than the sum of its proper divisors (8092369).

53891663 is a wasteful number, since it uses less digits than its factorization.

53891663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49201.

The product of its digits is 116640, while the sum is 41.

The square root of 53891663 is about 7341.0941282618. The cubic root of 53891663 is about 377.7233752463.

The spelling of 53891663 in words is "fifty-three million, eight hundred ninety-one thousand, six hundred sixty-three".