1097795690 has 16 divisors (see below), whose sum is σ = 1976590728. Its totient is φ = 438994176.

The previous prime is 1097795683. The next prime is 1097795701. The reversal of 1097795690 is 965977901.

It is a Cunningham number, because it is equal to 33133²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 754545961 + 343249729 = 27469^2 + 18527^2 .

It is a super-2 number, since 2×1097795690² = 2410310753965152200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27254 + ... + 54206.

Almost surely, 2^1097795690 is an apocalyptic number.

1097795690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1097795690 is a deficient number, since it is larger than the sum of its proper divisors (878795038).

1097795690 is a wasteful number, since it uses less digits than its factorization.

1097795690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31033.

The product of its (nonzero) digits is 1071630, while the sum is 53.

The square root of 1097795690 is about 33133.0000150907. Note that the first 4 decimals coincide. The cubic root of 1097795690 is about 1031.5901193883.

The spelling of 1097795690 in words is "one billion, ninety-seven million, seven hundred ninety-five thousand, six hundred ninety".