394968481 has 2 divisors, whose sum is σ = 394968482. Its totient is φ = 394968480.

The previous prime is 394968467. The next prime is 394968491. The reversal of 394968481 is 184869493.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206180881 + 188787600 = 14359^2 + 13740^2 .

It is an emirp because it is prime and its reverse (184869493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394968481 - 2¹⁵ = 394935713 is a prime.

It is a super-2 number, since 2×394968481² = 312000201966894722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (394968421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197484240 + 197484241.

It is an arithmetic number, because the mean of its divisors is an integer number (197484241).

Almost surely, 2^394968481 is an apocalyptic number.

It is an amenable number.

394968481 is a deficient number, since it is larger than the sum of its proper divisors (1).

394968481 is an equidigital number, since it uses as much as digits as its factorization.

394968481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 52.

The square root of 394968481 is about 19873.8139520325. The cubic root of 394968481 is about 733.7038758013.

The spelling of 394968481 in words is "three hundred ninety-four million, nine hundred sixty-eight thousand, four hundred eighty-one".