3405947 has 2 divisors, whose sum is σ = 3405948. Its totient is φ = 3405946.

The previous prime is 3405943. The next prime is 3405953. The reversal of 3405947 is 7495043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3405947 - 2² = 3405943 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3405943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1702973 + 1702974.

It is an arithmetic number, because the mean of its divisors is an integer number (1702974).

Almost surely, 2^3405947 is an apocalyptic number.

3405947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3405947 is an equidigital number, since it uses as much as digits as its factorization.

3405947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 3405947 is about 1845.5207937057. The cubic root of 3405947 is about 150.4570798461.

The spelling of 3405947 in words is "three million, four hundred five thousand, nine hundred forty-seven".