1630247 has 2 divisors, whose sum is σ = 1630248. Its totient is φ = 1630246.

The previous prime is 1630243. The next prime is 1630253. The reversal of 1630247 is 7420361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1630247 - 2² = 1630243 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815123 + 815124.

It is an arithmetic number, because the mean of its divisors is an integer number (815124).

2^1630247 is an apocalyptic number.

1630247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630247 is an equidigital number, since it uses as much as digits as its factorization.

1630247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 1630247 is about 1276.8112624817. The cubic root of 1630247 is about 117.6931364166.

The spelling of 1630247 in words is "one million, six hundred thirty thousand, two hundred forty-seven".