3870264721 has 4 divisors (see below), whose sum is σ = 3873755700. Its totient is φ = 3866773744.

The previous prime is 3870264707. The next prime is 3870264731. The reversal of 3870264721 is 1274620783.

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 805424400 + 3064840321 = 28380^2 + 55361^2 .

It is a cyclic number.

It is not a de Polignac number, because 3870264721 - 2²³ = 3861876113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3870264731) 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, 1743826 + ... + 1746043.

It is an arithmetic number, because the mean of its divisors is an integer number (968438925).

Almost surely, 2^3870264721 is an apocalyptic number.

It is an amenable number.

3870264721 is a deficient number, since it is larger than the sum of its proper divisors (3490979).

3870264721 is a wasteful number, since it uses less digits than its factorization.

3870264721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490978.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 3870264721 is about 62211.4516869684. The cubic root of 3870264721 is about 1570.0502669613.

The spelling of 3870264721 in words is "three billion, eight hundred seventy million, two hundred sixty-four thousand, seven hundred twenty-one".