3921159401 has 2 divisors, whose sum is σ = 3921159402. Its totient is φ = 3921159400.

The previous prime is 3921159383. The next prime is 3921159491. The reversal of 3921159401 is 1049511293.

It is a happy number.

3921159401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3918760000 + 2399401 = 62600^2 + 1549^2 .

It is a cyclic number.

It is not a de Polignac number, because 3921159401 - 2¹⁰ = 3921158377 is a prime.

It is not a weakly prime, because it can be changed into another prime (3921159491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960579700 + 1960579701.

It is an arithmetic number, because the mean of its divisors is an integer number (1960579701).

Almost surely, 2^3921159401 is an apocalyptic number.

It is an amenable number.

3921159401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3921159401 is an equidigital number, since it uses as much as digits as its factorization.

3921159401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 3921159401 is about 62619.1616120816. The cubic root of 3921159401 is about 1576.9024664551.

The spelling of 3921159401 in words is "three billion, nine hundred twenty-one million, one hundred fifty-nine thousand, four hundred one".