548409401 has 16 divisors (see below), whose sum is σ = 605784960. Its totient is φ = 494672640.

The previous prime is 548409397. The next prime is 548409403. The reversal of 548409401 is 104904845.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 548409401 - 2² = 548409397 is a prime.

It is a super-2 number, since 2×548409401² = 601505742210357602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (548409403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19121 + ... + 38241.

It is an arithmetic number, because the mean of its divisors is an integer number (37861560).

It is a Poulet number, since it divides 2^548409400-1.

Almost surely, 2^548409401 is an apocalyptic number.

548409401 is the 19121-st pentagonal number.

It is an amenable number.

548409401 is a deficient number, since it is larger than the sum of its proper divisors (57375559).

548409401 is a wasteful number, since it uses less digits than its factorization.

548409401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19216.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 548409401 is about 23418.1425608437. The cubic root of 548409401 is about 818.5306827757.

The spelling of 548409401 in words is "five hundred forty-eight million, four hundred nine thousand, four hundred one".