394924451 has 2 divisors, whose sum is σ = 394924452. Its totient is φ = 394924450.

The previous prime is 394924441. The next prime is 394924457. The reversal of 394924451 is 154429493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394924451 - 2¹⁰ = 394923427 is a prime.

It is a Sophie Germain prime.

It is equal to p_21079994 and since 394924451 and 21079994 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 394924399 and 394924408.

It is not a weakly prime, because it can be changed into another prime (394924457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197462225 + 197462226.

It is an arithmetic number, because the mean of its divisors is an integer number (197462226).

Almost surely, 2^394924451 is an apocalyptic number.

394924451 is a deficient number, since it is larger than the sum of its proper divisors (1).

394924451 is an equidigital number, since it uses as much as digits as its factorization.

394924451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 394924451 is about 19872.7061820981. The cubic root of 394924451 is about 733.6766110247.

The spelling of 394924451 in words is "three hundred ninety-four million, nine hundred twenty-four thousand, four hundred fifty-one".