394658463391 has 2 divisors, whose sum is σ = 394658463392. Its totient is φ = 394658463390.

The previous prime is 394658463389. The next prime is 394658463481. The reversal of 394658463391 is 193364856493.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394658463391 - 2¹ = 394658463389 is a prime.

It is a super-2 number, since 2×394658463391² (a number of 24 digits) contains 22 as substring.

Together with 394658463389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394658463371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197329231695 + 197329231696.

It is an arithmetic number, because the mean of its divisors is an integer number (197329231696).

Almost surely, 2^394658463391 is an apocalyptic number.

394658463391 is a deficient number, since it is larger than the sum of its proper divisors (1).

394658463391 is an equidigital number, since it uses as much as digits as its factorization.

394658463391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50388480, while the sum is 61.

The spelling of 394658463391 in words is "three hundred ninety-four billion, six hundred fifty-eight million, four hundred sixty-three thousand, three hundred ninety-one".