54719989 has 4 divisors (see below), whose sum is σ = 55617100. Its totient is φ = 53822880.

The previous prime is 54719983. The next prime is 54720007. The reversal of 54719989 is 98991745.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98991745 = 5 ⋅19798349.

It can be written as a sum of positive squares in 2 ways, for example, as 5130225 + 49589764 = 2265^2 + 7042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54719989 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 (54719983) 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, 448464 + ... + 448585.

It is an arithmetic number, because the mean of its divisors is an integer number (13904275).

Almost surely, 2^54719989 is an apocalyptic number.

It is an amenable number.

54719989 is a deficient number, since it is larger than the sum of its proper divisors (897111).

54719989 is an equidigital number, since it uses as much as digits as its factorization.

54719989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897110.

The product of its digits is 816480, while the sum is 52.

The square root of 54719989 is about 7397.2960600479. The cubic root of 54719989 is about 379.6487728817.

The spelling of 54719989 in words is "fifty-four million, seven hundred nineteen thousand, nine hundred eighty-nine".