694406669 has 4 divisors (see below), whose sum is σ = 757534560. Its totient is φ = 631278780.

The previous prime is 694406659. The next prime is 694406729. The reversal of 694406669 is 966604496.

It is a happy number.

694406669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 694406669 - 2¹⁶ = 694341133 is a prime.

It is a super-2 number, since 2×694406669² = 964401243903351122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694406659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31563929 + ... + 31563950.

It is an arithmetic number, because the mean of its divisors is an integer number (189383640).

Almost surely, 2^694406669 is an apocalyptic number.

It is an amenable number.

694406669 is a deficient number, since it is larger than the sum of its proper divisors (63127891).

694406669 is a wasteful number, since it uses less digits than its factorization.

694406669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63127890.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The square root of 694406669 is about 26351.5970863248. The cubic root of 694406669 is about 885.5327504011.

The spelling of 694406669 in words is "six hundred ninety-four million, four hundred six thousand, six hundred sixty-nine".