54390905 has 16 divisors (see below), whose sum is σ = 69290640. Its totient is φ = 40845312.

The previous prime is 54390893. The next prime is 54390937. The reversal of 54390905 is 50909345.

It can be written as a sum of positive squares in 8 ways, for example, as 529984 + 53860921 = 728^2 + 7339^2 .

It is a cyclic number.

It is not a de Polignac number, because 54390905 - 2⁶ = 54390841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48491 + ... + 49599.

It is an arithmetic number, because the mean of its divisors is an integer number (4330665).

Almost surely, 2^54390905 is an apocalyptic number.

It is an amenable number.

54390905 is a deficient number, since it is larger than the sum of its proper divisors (14899735).

54390905 is a wasteful number, since it uses less digits than its factorization.

54390905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 54390905 is about 7375.0189830264. The cubic root of 54390905 is about 378.8861775097.

The spelling of 54390905 in words is "fifty-four million, three hundred ninety thousand, nine hundred five".