54720417 has 4 divisors (see below), whose sum is σ = 72960560. Its totient is φ = 36480276.

The previous prime is 54720401. The next prime is 54720431. The reversal of 54720417 is 71402745.

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.

It is not a de Polignac number, because 54720417 - 2⁴ = 54720401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54720517) 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, 9120067 + ... + 9120072.

It is an arithmetic number, because the mean of its divisors is an integer number (18240140).

Almost surely, 2^54720417 is an apocalyptic number.

It is an amenable number.

54720417 is a deficient number, since it is larger than the sum of its proper divisors (18240143).

54720417 is a wasteful number, since it uses less digits than its factorization.

54720417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18240142.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 54720417 is about 7397.3249894810. The cubic root of 54720417 is about 379.6497627044.

The spelling of 54720417 in words is "fifty-four million, seven hundred twenty thousand, four hundred seventeen".