1691064613 has 32 divisors (see below), whose sum is σ = 2108865024. Its totient is φ = 1322790912.

The previous prime is 1691064611. The next prime is 1691064629. The reversal of 1691064613 is 3164601961.

It is a cyclic number.

It is not a de Polignac number, because 1691064613 - 2¹ = 1691064611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691064611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1906056 + ... + 1906942.

It is an arithmetic number, because the mean of its divisors is an integer number (65902032).

Almost surely, 2^1691064613 is an apocalyptic number.

It is an amenable number.

1691064613 is a deficient number, since it is larger than the sum of its proper divisors (417800411).

1691064613 is a wasteful number, since it uses less digits than its factorization.

1691064613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 1691064613 is about 41122.5560124854. The cubic root of 1691064613 is about 1191.3884913238.

The spelling of 1691064613 in words is "one billion, six hundred ninety-one million, sixty-four thousand, six hundred thirteen".