57478279 has 4 divisors (see below), whose sum is σ = 59031784. Its totient is φ = 55924776.

The previous prime is 57478271. The next prime is 57478297. The reversal of 57478279 is 97287475.

57478279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57478279 - 2³ = 57478271 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57478271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776697 + ... + 776770.

It is an arithmetic number, because the mean of its divisors is an integer number (14757946).

Almost surely, 2^57478279 is an apocalyptic number.

57478279 is a deficient number, since it is larger than the sum of its proper divisors (1553505).

57478279 is a wasteful number, since it uses less digits than its factorization.

57478279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553504.

The product of its digits is 987840, while the sum is 49.

The square root of 57478279 is about 7581.4430684402. The cubic root of 57478279 is about 385.9235241837.

The spelling of 57478279 in words is "fifty-seven million, four hundred seventy-eight thousand, two hundred seventy-nine".