394012651 has 2 divisors, whose sum is σ = 394012652. Its totient is φ = 394012650.

The previous prime is 394012631. The next prime is 394012657. The reversal of 394012651 is 156210493.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394012651 is a prime.

It is not a weakly prime, because it can be changed into another prime (394012657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197006325 + 197006326.

It is an arithmetic number, because the mean of its divisors is an integer number (197006326).

Almost surely, 2^394012651 is an apocalyptic number.

394012651 is a deficient number, since it is larger than the sum of its proper divisors (1).

394012651 is an equidigital number, since it uses as much as digits as its factorization.

394012651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 394012651 is about 19849.7519128074. The cubic root of 394012651 is about 733.1115393769. Note that the first 3 decimals are identical.

The spelling of 394012651 in words is "three hundred ninety-four million, twelve thousand, six hundred fifty-one".