3739891521 has 8 divisors (see below), whose sum is σ = 5049642880. Its totient is φ = 2461700592.

The previous prime is 3739891481. The next prime is 3739891541. The reversal of 3739891521 is 1251989373.

3739891521 is digitally balanced in base 3, 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 3739891521 - 2¹⁷ = 3739760449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3739891541) 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, 7889830 + ... + 7890303.

It is an arithmetic number, because the mean of its divisors is an integer number (631205360).

Almost surely, 2^3739891521 is an apocalyptic number.

It is an amenable number.

3739891521 is a deficient number, since it is larger than the sum of its proper divisors (1309751359).

3739891521 is a wasteful number, since it uses less digits than its factorization.

3739891521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15780215.

The product of its digits is 408240, while the sum is 48.

The square root of 3739891521 is about 61154.6524885883. The cubic root of 3739891521 is about 1552.2190236790.

The spelling of 3739891521 in words is "three billion, seven hundred thirty-nine million, eight hundred ninety-one thousand, five hundred twenty-one".