3909481 has 2 divisors, whose sum is σ = 3909482. Its totient is φ = 3909480.

The previous prime is 3909469. The next prime is 3909491. The reversal of 3909481 is 1849093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2941225 + 968256 = 1715^2 + 984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3909481 is a prime.

It is a super-2 number, since 2×3909481² = 30568083378722, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3909401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1954740 + 1954741.

It is an arithmetic number, because the mean of its divisors is an integer number (1954741).

Almost surely, 2^3909481 is an apocalyptic number.

It is an amenable number.

3909481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3909481 is an equidigital number, since it uses as much as digits as its factorization.

3909481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 3909481 is about 1977.2407541825. The cubic root of 3909481 is about 157.5335411895.

The spelling of 3909481 in words is "three million, nine hundred nine thousand, four hundred eighty-one".