1694664961 has 8 divisors (see below), whose sum is σ = 1867030848. Its totient is φ = 1525350000.

The previous prime is 1694664953. The next prime is 1694664971.

1694664961 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1694664961 - 2³ = 1694664953 is a prime.

It is a super-2 number, since 2×1694664961² = 5743778660082263042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1694664899 and 1694664908.

It is not an unprimeable number, because it can be changed into a prime (1694664901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761565 + ... + 763786.

It is an arithmetic number, because the mean of its divisors is an integer number (233378856).

Almost surely, 2^1694664961 is an apocalyptic number.

1694664961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1694664961 is a deficient number, since it is larger than the sum of its proper divisors (172365887).

1694664961 is a wasteful number, since it uses less digits than its factorization.

1694664961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525463.

The product of its digits is 1679616, while the sum is 52.

The square root of 1694664961 is about 41166.3085665936. The cubic root of 1694664961 is about 1192.2333974696.

The spelling of 1694664961 in words is "one billion, six hundred ninety-four million, six hundred sixty-four thousand, nine hundred sixty-one".