3856479961 has 2 divisors, whose sum is σ = 3856479962. Its totient is φ = 3856479960.

The previous prime is 3856479941. The next prime is 3856479997. The reversal of 3856479961 is 1699746583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2114252361 + 1742227600 = 45981^2 + 41740^2 .

It is an emirp because it is prime and its reverse (1699746583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3856479961 - 2¹³ = 3856471769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3856479896 and 3856479905.

It is not a weakly prime, because it can be changed into another prime (3856479901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928239980 + 1928239981.

It is an arithmetic number, because the mean of its divisors is an integer number (1928239981).

Almost surely, 2^3856479961 is an apocalyptic number.

It is an amenable number.

3856479961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3856479961 is an equidigital number, since it uses as much as digits as its factorization.

3856479961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 58.

The square root of 3856479961 is about 62100.5632905210. The cubic root of 3856479961 is about 1568.1840283679.

The spelling of 3856479961 in words is "three billion, eight hundred fifty-six million, four hundred seventy-nine thousand, nine hundred sixty-one".