394686499 has 2 divisors, whose sum is σ = 394686500. Its totient is φ = 394686498.

The previous prime is 394686403. The next prime is 394686503. The reversal of 394686499 is 994686493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394686499 - 2¹⁹ = 394162211 is a prime.

It is not a weakly prime, because it can be changed into another prime (394686199) 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, 197343249 + 197343250.

It is an arithmetic number, because the mean of its divisors is an integer number (197343250).

Almost surely, 2^394686499 is an apocalyptic number.

394686499 is a deficient number, since it is larger than the sum of its proper divisors (1).

394686499 is an equidigital number, since it uses as much as digits as its factorization.

394686499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 58.

The square root of 394686499 is about 19866.7183752123. The cubic root of 394686499 is about 733.5292284969.

The spelling of 394686499 in words is "three hundred ninety-four million, six hundred eighty-six thousand, four hundred ninety-nine".