54445409 has 4 divisors (see below), whose sum is σ = 54460416. Its totient is φ = 54430404.

The previous prime is 54445399. The next prime is 54445451. The reversal of 54445409 is 90454445.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90454445 = 5 ⋅18090889.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54445409 is a prime.

It is a super-2 number, since 2×54445409² = 5928605122354562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54445309) 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, 1712 + ... + 10574.

It is an arithmetic number, because the mean of its divisors is an integer number (13615104).

Almost surely, 2^54445409 is an apocalyptic number.

It is an amenable number.

54445409 is a deficient number, since it is larger than the sum of its proper divisors (15007).

54445409 is an equidigital number, since it uses as much as digits as its factorization.

54445409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15006.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 54445409 is about 7378.7132347043. The cubic root of 54445409 is about 379.0126932580.

The spelling of 54445409 in words is "fifty-four million, four hundred forty-five thousand, four hundred nine".