393212471 has 2 divisors, whose sum is σ = 393212472. Its totient is φ = 393212470.

The previous prime is 393212461. The next prime is 393212507. The reversal of 393212471 is 174212393.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393212471 is a prime.

It is a super-3 number, since 3×393212471³ (a number of 27 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393212461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196606235 + 196606236.

It is an arithmetic number, because the mean of its divisors is an integer number (196606236).

Almost surely, 2^393212471 is an apocalyptic number.

393212471 is a deficient number, since it is larger than the sum of its proper divisors (1).

393212471 is an equidigital number, since it uses as much as digits as its factorization.

393212471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 393212471 is about 19829.5857495814. The cubic root of 393212471 is about 732.6149235519.

The spelling of 393212471 in words is "three hundred ninety-three million, two hundred twelve thousand, four hundred seventy-one".