3940969 has 2 divisors, whose sum is σ = 3940970. Its totient is φ = 3940968.

The previous prime is 3940967. The next prime is 3940987. The reversal of 3940969 is 9690493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2930944 + 1010025 = 1712^2 + 1005^2 .

It is a cyclic number.

It is not a de Polignac number, because 3940969 - 2¹ = 3940967 is a prime.

It is a super-2 number, since 2×3940969² = 31062473317922, which contains 22 as substring.

Together with 3940967, it forms a pair of twin primes.

It is a Chen prime.

3940969 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3940967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970484 + 1970485.

It is an arithmetic number, because the mean of its divisors is an integer number (1970485).

Almost surely, 2^3940969 is an apocalyptic number.

It is an amenable number.

3940969 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940969 is an equidigital number, since it uses as much as digits as its factorization.

3940969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 3940969 is about 1985.1873966958. The cubic root of 3940969 is about 157.9553497717.

The spelling of 3940969 in words is "three million, nine hundred forty thousand, nine hundred sixty-nine".