393493427 has 2 divisors, whose sum is σ = 393493428. Its totient is φ = 393493426.

The previous prime is 393493423. The next prime is 393493481. The reversal of 393493427 is 724394393.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 393493427 - 2² = 393493423 is a prime.

It is not a weakly prime, because it can be changed into another prime (393493423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196746713 + 196746714.

It is an arithmetic number, because the mean of its divisors is an integer number (196746714).

Almost surely, 2^393493427 is an apocalyptic number.

393493427 is a deficient number, since it is larger than the sum of its proper divisors (1).

393493427 is an equidigital number, since it uses as much as digits as its factorization.

393493427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 44.

The square root of 393493427 is about 19836.6687475493. The cubic root of 393493427 is about 732.7893699981.

The spelling of 393493427 in words is "three hundred ninety-three million, four hundred ninety-three thousand, four hundred twenty-seven".