53998963 has 4 divisors (see below), whose sum is σ = 56346768. Its totient is φ = 51651160.

The previous prime is 53998951. The next prime is 53998991. The reversal of 53998963 is 36989935.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53998963 is a prime.

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 53998963.

It is not an unprimeable number, because it can be changed into a prime (53998913) 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, 1173868 + ... + 1173913.

It is an arithmetic number, because the mean of its divisors is an integer number (14086692).

Almost surely, 2^53998963 is an apocalyptic number.

53998963 is a deficient number, since it is larger than the sum of its proper divisors (2347805).

53998963 is a wasteful number, since it uses less digits than its factorization.

53998963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347804.

The product of its digits is 1574640, while the sum is 52.

The square root of 53998963 is about 7348.3986690979. The cubic root of 53998963 is about 377.9738954379.

Subtracting from 53998963 its reverse (36989935), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 53998963 in words is "fifty-three million, nine hundred ninety-eight thousand, nine hundred sixty-three".