478821749 has 4 divisors (see below), whose sum is σ = 547224864. Its totient is φ = 410418636.

The previous prime is 478821743. The next prime is 478821767. The reversal of 478821749 is 947128874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 478821749 - 2¹² = 478817653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 478821697 and 478821706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478821743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34201547 + ... + 34201560.

It is an arithmetic number, because the mean of its divisors is an integer number (136806216).

Almost surely, 2^478821749 is an apocalyptic number.

It is an amenable number.

478821749 is a deficient number, since it is larger than the sum of its proper divisors (68403115).

478821749 is an equidigital number, since it uses as much as digits as its factorization.

478821749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68403114.

The product of its digits is 903168, while the sum is 50.

The square root of 478821749 is about 21881.9960012792. The cubic root of 478821749 is about 782.3323509956.

The spelling of 478821749 in words is "four hundred seventy-eight million, eight hundred twenty-one thousand, seven hundred forty-nine".