54378729 has 8 divisors (see below), whose sum is σ = 80561120. Its totient is φ = 36252468.

The previous prime is 54378721. The next prime is 54378769. The reversal of 54378729 is 92787345.

54378729 is a `hidden beast` number, since 543 + 7 + 87 + 29 = 666.

It is not a de Polignac number, because 54378729 - 2³ = 54378721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54378721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1006987 + ... + 1007040.

It is an arithmetic number, because the mean of its divisors is an integer number (10070140).

Almost surely, 2^54378729 is an apocalyptic number.

It is an amenable number.

54378729 is a deficient number, since it is larger than the sum of its proper divisors (26182391).

54378729 is a wasteful number, since it uses less digits than its factorization.

54378729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014036 (or 2014030 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 54378729 is about 7374.1934474219. The cubic root of 54378729 is about 378.8579027924.

It can be divided in two parts, 5 and 4378729, that added together give a palindrome (4378734).

The spelling of 54378729 in words is "fifty-four million, three hundred seventy-eight thousand, seven hundred twenty-nine".