3857959961 has 2 divisors, whose sum is σ = 3857959962. Its totient is φ = 3857959960.

The previous prime is 3857959949. The next prime is 3857959969. The reversal of 3857959961 is 1699597583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2261478025 + 1596481936 = 47555^2 + 39956^2 .

It is an emirp because it is prime and its reverse (1699597583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3857959961 - 2¹⁴ = 3857943577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3857959894 and 3857959903.

It is not a weakly prime, because it can be changed into another prime (3857959969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928979980 + 1928979981.

It is an arithmetic number, because the mean of its divisors is an integer number (1928979981).

Almost surely, 2^3857959961 is an apocalyptic number.

It is an amenable number.

3857959961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3857959961 is an equidigital number, since it uses as much as digits as its factorization.

3857959961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18370800, while the sum is 62.

The square root of 3857959961 is about 62112.4783034778. The cubic root of 3857959961 is about 1568.3846098611.

The spelling of 3857959961 in words is "three billion, eight hundred fifty-seven million, nine hundred fifty-nine thousand, nine hundred sixty-one".