394144651 has 2 divisors, whose sum is σ = 394144652. Its totient is φ = 394144650.

The previous prime is 394144649. The next prime is 394144657. The reversal of 394144651 is 156441493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394144651 - 2¹ = 394144649 is a prime.

Together with 394144649, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 394144651.

It is not a weakly prime, because it can be changed into another prime (394144657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197072325 + 197072326.

It is an arithmetic number, because the mean of its divisors is an integer number (197072326).

Almost surely, 2^394144651 is an apocalyptic number.

394144651 is a deficient number, since it is larger than the sum of its proper divisors (1).

394144651 is an equidigital number, since it uses as much as digits as its factorization.

394144651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 394144651 is about 19853.0766129585. The cubic root of 394144651 is about 733.1933979318.

The spelling of 394144651 in words is "three hundred ninety-four million, one hundred forty-four thousand, six hundred fifty-one".