4749470921 has 4 divisors (see below), whose sum is σ = 5114814852. Its totient is φ = 4384126992.

The previous prime is 4749470917. The next prime is 4749470939. The reversal of 4749470921 is 1290749474.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1858903225 + 2890567696 = 43115^2 + 53764^2 .

It is a cyclic number.

It is not a de Polignac number, because 4749470921 - 2² = 4749470917 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4749470941) 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, 182671946 + ... + 182671971.

It is an arithmetic number, because the mean of its divisors is an integer number (1278703713).

Almost surely, 2^4749470921 is an apocalyptic number.

It is an amenable number.

4749470921 is a deficient number, since it is larger than the sum of its proper divisors (365343931).

4749470921 is a wasteful number, since it uses less digits than its factorization.

4749470921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365343930.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 4749470921 is about 68916.4053110723. The cubic root of 4749470921 is about 1680.9252887808.

The spelling of 4749470921 in words is "four billion, seven hundred forty-nine million, four hundred seventy thousand, nine hundred twenty-one".