694448019 has 16 divisors (see below), whose sum is σ = 1062000640. Its totient is φ = 448030440.

The previous prime is 694448017. The next prime is 694448057. The reversal of 694448019 is 910844496.

It is not a de Polignac number, because 694448019 - 2¹ = 694448017 is a prime.

It is a super-2 number, since 2×694448019² = 964516102186048722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (694448017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414007 + ... + 415680.

It is an arithmetic number, because the mean of its divisors is an integer number (66375040).

Almost surely, 2^694448019 is an apocalyptic number.

694448019 is a deficient number, since it is larger than the sum of its proper divisors (367552621).

694448019 is a wasteful number, since it uses less digits than its factorization.

694448019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829727 (or 829721 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 694448019 is about 26352.3816570723. The cubic root of 694448019 is about 885.5503270624.

The spelling of 694448019 in words is "six hundred ninety-four million, four hundred forty-eight thousand, nineteen".