53999994 has 16 divisors (see below), whose sum is σ = 108072000. Its totient is φ = 17988000.

The previous prime is 53999989. The next prime is 54000031. The reversal of 53999994 is 49999935.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16494 + ... + 19494.

It is an arithmetic number, because the mean of its divisors is an integer number (6754500).

Almost surely, 2^53999994 is an apocalyptic number.

53999994 is an abundant number, since it is smaller than the sum of its proper divisors (54072006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53999994 is a wasteful number, since it uses less digits than its factorization.

53999994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005.

The product of its digits is 3542940, while the sum is 57.

The square root of 53999994 is about 7348.4688201012. The cubic root of 53999994 is about 377.9763009693.

The spelling of 53999994 in words is "fifty-three million, nine hundred ninety-nine thousand, nine hundred ninety-four".