1993477 has 2 divisors, whose sum is σ = 1993478. Its totient is φ = 1993476.

The previous prime is 1993457. The next prime is 1993483. The reversal of 1993477 is 7743991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1976836 + 16641 = 1406^2 + 129^2 .

It is an emirp because it is prime and its reverse (7743991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1993477 - 2⁷ = 1993349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996738 + 996739.

It is an arithmetic number, because the mean of its divisors is an integer number (996739).

2^1993477 is an apocalyptic number.

It is an amenable number.

1993477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993477 is an equidigital number, since it uses as much as digits as its factorization.

1993477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 1993477 is about 1411.9054500922. The cubic root of 1993477 is about 125.8549813882.

The spelling of 1993477 in words is "one million, nine hundred ninety-three thousand, four hundred seventy-seven".