54994139 has 4 divisors (see below), whose sum is σ = 55224480. Its totient is φ = 54763800.

The previous prime is 54994103. The next prime is 54994141. The reversal of 54994139 is 93149945.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 54994139 - 2¹² = 54990043 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 54994139.

It is not an unprimeable number, because it can be changed into a prime (54994339) 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, 114812 + ... + 115289.

It is an arithmetic number, because the mean of its divisors is an integer number (13806120).

Almost surely, 2^54994139 is an apocalyptic number.

54994139 is a deficient number, since it is larger than the sum of its proper divisors (230341).

54994139 is a wasteful number, since it uses less digits than its factorization.

54994139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230340.

The product of its digits is 174960, while the sum is 44.

The square root of 54994139 is about 7415.8033280286. The cubic root of 54994139 is about 380.2817370482.

The spelling of 54994139 in words is "fifty-four million, nine hundred ninety-four thousand, one hundred thirty-nine".