3914647861 has 2 divisors, whose sum is σ = 3914647862. Its totient is φ = 3914647860.

The previous prime is 3914647837. The next prime is 3914647903. The reversal of 3914647861 is 1687464193.

3914647861 is digitally balanced in base 2 and base 3, because in such bases 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., 3610808100 + 303839761 = 60090^2 + 17431^2 .

It is a cyclic number.

It is not a de Polignac number, because 3914647861 - 2⁵ = 3914647829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3914647831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957323930 + 1957323931.

It is an arithmetic number, because the mean of its divisors is an integer number (1957323931).

Almost surely, 2^3914647861 is an apocalyptic number.

It is an amenable number.

3914647861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3914647861 is an equidigital number, since it uses as much as digits as its factorization.

3914647861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 3914647861 is about 62567.1468184382. The cubic root of 3914647861 is about 1576.0291063545.

The spelling of 3914647861 in words is "three billion, nine hundred fourteen million, six hundred forty-seven thousand, eight hundred sixty-one".