1691407053 has 24 divisors (see below), whose sum is σ = 2804380800. Its totient is φ = 962289504.

The previous prime is 1691407033. The next prime is 1691407057. The reversal of 1691407053 is 3507041961.

It is not a de Polignac number, because 1691407053 - 2¹⁰ = 1691406029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1691406999 and 1691407017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691407057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44193 + ... + 73046.

It is an arithmetic number, because the mean of its divisors is an integer number (116849200).

Almost surely, 2^1691407053 is an apocalyptic number.

It is an amenable number.

1691407053 is a deficient number, since it is larger than the sum of its proper divisors (1112973747).

1691407053 is a wasteful number, since it uses less digits than its factorization.

1691407053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117481 (or 117478 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1691407053 is about 41126.7194534162. The cubic root of 1691407053 is about 1191.4689044822.

The spelling of 1691407053 in words is "one billion, six hundred ninety-one million, four hundred seven thousand, fifty-three".