1622947 has 2 divisors, whose sum is σ = 1622948. Its totient is φ = 1622946.

The previous prime is 1622917. The next prime is 1622953. The reversal of 1622947 is 7492261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1622947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1622917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811473 + 811474.

It is an arithmetic number, because the mean of its divisors is an integer number (811474).

2^1622947 is an apocalyptic number.

1622947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622947 is an equidigital number, since it uses as much as digits as its factorization.

1622947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 1622947 is about 1273.9493710505. The cubic root of 1622947 is about 117.5172028532.

The spelling of 1622947 in words is "one million, six hundred twenty-two thousand, nine hundred forty-seven".