1994477 has 2 divisors, whose sum is σ = 1994478. Its totient is φ = 1994476.

The previous prime is 1994471. The next prime is 1994479. The reversal of 1994477 is 7744991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1503076 + 491401 = 1226^2 + 701^2 .

It is an emirp because it is prime and its reverse (7744991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1994477 - 2⁶ = 1994413 is a prime.

Together with 1994479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997238 + 997239.

It is an arithmetic number, because the mean of its divisors is an integer number (997239).

2^1994477 is an apocalyptic number.

It is an amenable number.

1994477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994477 is an equidigital number, since it uses as much as digits as its factorization.

1994477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 1994477 is about 1412.2595370540. The cubic root of 1994477 is about 125.8760223371.

The spelling of 1994477 in words is "one million, nine hundred ninety-four thousand, four hundred seventy-seven".