3391777861 has 2 divisors, whose sum is σ = 3391777862. Its totient is φ = 3391777860.

The previous prime is 3391777843. The next prime is 3391777871. The reversal of 3391777861 is 1687771933.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2008384225 + 1383393636 = 44815^2 + 37194^2 .

It is an emirp because it is prime and its reverse (1687771933) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3391777861 - 2⁷ = 3391777733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3391777799 and 3391777808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3391777811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1695888930 + 1695888931.

It is an arithmetic number, because the mean of its divisors is an integer number (1695888931).

Almost surely, 2^3391777861 is an apocalyptic number.

It is an amenable number.

3391777861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3391777861 is an equidigital number, since it uses as much as digits as its factorization.

3391777861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 52.

The square root of 3391777861 is about 58238.9720118753. The cubic root of 3391777861 is about 1502.4815015400.

The spelling of 3391777861 in words is "three billion, three hundred ninety-one million, seven hundred seventy-seven thousand, eight hundred sixty-one".