3894213157 has 2 divisors, whose sum is σ = 3894213158. Its totient is φ = 3894213156.

The previous prime is 3894213143. The next prime is 3894213187. The reversal of 3894213157 is 7513124983.

3894213157 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., 3571974756 + 322238401 = 59766^2 + 17951^2 .

It is a cyclic number.

It is not a de Polignac number, because 3894213157 - 2²⁷ = 3759995429 is a prime.

It is a super-2 number, since 2×3894213157² = 30329792224303813298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3894213187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947106578 + 1947106579.

It is an arithmetic number, because the mean of its divisors is an integer number (1947106579).

Almost surely, 2^3894213157 is an apocalyptic number.

It is an amenable number.

3894213157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3894213157 is an equidigital number, since it uses as much as digits as its factorization.

3894213157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 3894213157 is about 62403.6309600651. The cubic root of 3894213157 is about 1573.2819976258.

The spelling of 3894213157 in words is "three billion, eight hundred ninety-four million, two hundred thirteen thousand, one hundred fifty-seven".