3947521053 has 8 divisors (see below), whose sum is σ = 6015270208. Its totient is φ = 2255726304.

The previous prime is 3947521003. The next prime is 3947521069. The reversal of 3947521053 is 3501257493.

It is a happy number.

3947521053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3947521053 - 2¹² = 3947516957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947521003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93988576 + ... + 93988617.

It is an arithmetic number, because the mean of its divisors is an integer number (751908776).

Almost surely, 2^3947521053 is an apocalyptic number.

It is an amenable number.

3947521053 is a deficient number, since it is larger than the sum of its proper divisors (2067749155).

3947521053 is a wasteful number, since it uses less digits than its factorization.

3947521053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187977203.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 3947521053 is about 62829.3009112786. The cubic root of 3947521053 is about 1580.4283746073.

The spelling of 3947521053 in words is "three billion, nine hundred forty-seven million, five hundred twenty-one thousand, fifty-three".