394487701 has 2 divisors, whose sum is σ = 394487702. Its totient is φ = 394487700.

The previous prime is 394487689. The next prime is 394487711. The reversal of 394487701 is 107784493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346518225 + 47969476 = 18615^2 + 6926^2 .

It is a cyclic number.

It is not a de Polignac number, because 394487701 - 2¹⁹ = 393963413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394487711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197243850 + 197243851.

It is an arithmetic number, because the mean of its divisors is an integer number (197243851).

Almost surely, 2^394487701 is an apocalyptic number.

It is an amenable number.

394487701 is a deficient number, since it is larger than the sum of its proper divisors (1).

394487701 is an equidigital number, since it uses as much as digits as its factorization.

394487701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 394487701 is about 19861.7144526851. The cubic root of 394487701 is about 733.4060517191.

The spelling of 394487701 in words is "three hundred ninety-four million, four hundred eighty-seven thousand, seven hundred one".