3974995321 has 12 divisors (see below), whose sum is σ = 4371227476. Its totient is φ = 3611963520.

The previous prime is 3974995319. The next prime is 3974995351. The reversal of 3974995321 is 1235994793.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3931290000 + 43705321 = 62700^2 + 6611^2 .

It is not a de Polignac number, because 3974995321 - 2¹ = 3974995319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3974995351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310381 + ... + 322933.

Almost surely, 2^3974995321 is an apocalyptic number.

It is an amenable number.

3974995321 is a deficient number, since it is larger than the sum of its proper divisors (396232155).

3974995321 is a wasteful number, since it uses less digits than its factorization.

3974995321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15192 (or 15181 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 52.

The square root of 3974995321 is about 63047.5639576978. The cubic root of 3974995321 is about 1584.0864311120.

The spelling of 3974995321 in words is "three billion, nine hundred seventy-four million, nine hundred ninety-five thousand, three hundred twenty-one".