54939409 has 12 divisors (see below), whose sum is σ = 64886592. Its totient is φ = 45566280.

The previous prime is 54939389. The next prime is 54939419. The reversal of 54939409 is 90493945.

It is not a de Polignac number, because 54939409 - 2¹⁵ = 54906641 is a prime.

It is a super-2 number, since 2×54939409² = 6036677322538562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54939419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2644 + ... + 10810.

It is an arithmetic number, because the mean of its divisors is an integer number (5407216).

Almost surely, 2^54939409 is an apocalyptic number.

It is an amenable number.

54939409 is a deficient number, since it is larger than the sum of its proper divisors (9947183).

54939409 is an equidigital number, since it uses as much as digits as its factorization.

54939409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8236 (or 8205 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 54939409 is about 7412.1123170119. The cubic root of 54939409 is about 380.1555434334.

The spelling of 54939409 in words is "fifty-four million, nine hundred thirty-nine thousand, four hundred nine".