3919961 has 2 divisors, whose sum is σ = 3919962. Its totient is φ = 3919960.

The previous prime is 3919943. The next prime is 3919973. The reversal of 3919961 is 1699193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3385600 + 534361 = 1840^2 + 731^2 .

It is an emirp because it is prime and its reverse (1699193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3919961 - 2⁶ = 3919897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3919261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1959980 + 1959981.

It is an arithmetic number, because the mean of its divisors is an integer number (1959981).

Almost surely, 2^3919961 is an apocalyptic number.

It is an amenable number.

3919961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3919961 is an equidigital number, since it uses as much as digits as its factorization.

3919961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 38.

The square root of 3919961 is about 1979.8891383105. The cubic root of 3919961 is about 157.6741803596.

The spelling of 3919961 in words is "three million, nine hundred nineteen thousand, nine hundred sixty-one".