694016399 has 2 divisors, whose sum is σ = 694016400. Its totient is φ = 694016398.

The previous prime is 694016377. The next prime is 694016419. The reversal of 694016399 is 993610496.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 694016399 - 2²⁰ = 692967823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694016339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347008199 + 347008200.

It is an arithmetic number, because the mean of its divisors is an integer number (347008200).

Almost surely, 2^694016399 is an apocalyptic number.

694016399 is a deficient number, since it is larger than the sum of its proper divisors (1).

694016399 is an equidigital number, since it uses as much as digits as its factorization.

694016399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 694016399 is about 26344.1909915640. The cubic root of 694016399 is about 885.3668237925.

The spelling of 694016399 in words is "six hundred ninety-four million, sixteen thousand, three hundred ninety-nine".