1691055794 has 4 divisors (see below), whose sum is σ = 2536583694. Its totient is φ = 845527896.

The previous prime is 1691055761. The next prime is 1691055809. The reversal of 1691055794 is 4975501961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 897901225 + 793154569 = 29965^2 + 28163^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422763947 + ... + 422763950.

Almost surely, 2^1691055794 is an apocalyptic number.

1691055794 is a deficient number, since it is larger than the sum of its proper divisors (845527900).

1691055794 is an equidigital number, since it uses as much as digits as its factorization.

1691055794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845527899.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 1691055794 is about 41122.4487840887. The cubic root of 1691055794 is about 1191.3864202669.

The spelling of 1691055794 in words is "one billion, six hundred ninety-one million, fifty-five thousand, seven hundred ninety-four".