1994651 has 2 divisors, whose sum is σ = 1994652. Its totient is φ = 1994650.

The previous prime is 1994647. The next prime is 1994659. The reversal of 1994651 is 1564991.

It is a weak prime.

It is an emirp because it is prime and its reverse (1564991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1994651 - 2² = 1994647 is a prime.

It is a super-2 number, since 2×1994651² = 7957265223602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1994659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997325 + 997326.

It is an arithmetic number, because the mean of its divisors is an integer number (997326).

2^1994651 is an apocalyptic number.

1994651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994651 is an equidigital number, since it uses as much as digits as its factorization.

1994651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 1994651 is about 1412.3211391182. The cubic root of 1994651 is about 125.8796827438.

The spelling of 1994651 in words is "one million, nine hundred ninety-four thousand, six hundred fifty-one".