3927961 has 2 divisors, whose sum is σ = 3927962. Its totient is φ = 3927960.

The previous prime is 3927943. The next prime is 3927967. The reversal of 3927961 is 1697293.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3924361 + 3600 = 1981^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 3927961 - 2⁵ = 3927929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3927961.

It is not a weakly prime, because it can be changed into another prime (3927967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1963980 + 1963981.

It is an arithmetic number, because the mean of its divisors is an integer number (1963981).

Almost surely, 2^3927961 is an apocalyptic number.

It is an amenable number.

3927961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3927961 is an equidigital number, since it uses as much as digits as its factorization.

3927961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 37.

The square root of 3927961 is about 1981.9084237169. The cubic root of 3927961 is about 157.7813698882.

It can be divided in two parts, 39279 and 61, that added together give a triangular number (39340 = T₂₈₀).

The spelling of 3927961 in words is "three million, nine hundred twenty-seven thousand, nine hundred sixty-one".