1916531693 has 8 divisors (see below), whose sum is σ = 1979888640. Its totient is φ = 1853270640.

The previous prime is 1916531647. The next prime is 1916531711. The reversal of 1916531693 is 3961356191.

It is a happy number.

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 1916531693 - 2¹⁰ = 1916530669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916531623) 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, 17843 + ... + 64431.

It is an arithmetic number, because the mean of its divisors is an integer number (247486080).

Almost surely, 2^1916531693 is an apocalyptic number.

It is an amenable number.

1916531693 is a deficient number, since it is larger than the sum of its proper divisors (63356947).

1916531693 is a wasteful number, since it uses less digits than its factorization.

1916531693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47947.

The product of its digits is 131220, while the sum is 44.

The square root of 1916531693 is about 43778.2102535040. The cubic root of 1916531693 is about 1242.1441598886.

The spelling of 1916531693 in words is "one billion, nine hundred sixteen million, five hundred thirty-one thousand, six hundred ninety-three".