993401471 has 2 divisors, whose sum is σ = 993401472. Its totient is φ = 993401470.

The previous prime is 993401449. The next prime is 993401473. The reversal of 993401471 is 174104399.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993401471 is a prime.

It is a super-3 number, since 3×993401471³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 993401473, 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 (993401473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496700735 + 496700736.

It is an arithmetic number, because the mean of its divisors is an integer number (496700736).

Almost surely, 2^993401471 is an apocalyptic number.

993401471 is a deficient number, since it is larger than the sum of its proper divisors (1).

993401471 is an equidigital number, since it uses as much as digits as its factorization.

993401471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 993401471 is about 31518.2720179898. The cubic root of 993401471 is about 997.7956346774.

The spelling of 993401471 in words is "nine hundred ninety-three million, four hundred one thousand, four hundred seventy-one".