54743989 has 4 divisors (see below), whose sum is σ = 55359180. Its totient is φ = 54128800.

The previous prime is 54743977. The next prime is 54743999. The reversal of 54743989 is 98934745.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29322225 + 25421764 = 5415^2 + 5042^2 .

It is a cyclic number.

It is not a de Polignac number, because 54743989 - 2⁵ = 54743957 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 (54743929) 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, 307462 + ... + 307639.

It is an arithmetic number, because the mean of its divisors is an integer number (13839795).

Almost surely, 2^54743989 is an apocalyptic number.

It is an amenable number.

54743989 is a deficient number, since it is larger than the sum of its proper divisors (615191).

54743989 is an equidigital number, since it uses as much as digits as its factorization.

54743989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615190.

The product of its digits is 1088640, while the sum is 49.

The square root of 54743989 is about 7398.9180965868. The cubic root of 54743989 is about 379.7042689868.

The spelling of 54743989 in words is "fifty-four million, seven hundred forty-three thousand, nine hundred eighty-nine".