1097792691 has 16 divisors (see below), whose sum is σ = 1529971200. Its totient is φ = 698846720.

The previous prime is 1097792687. The next prime is 1097792713. The reversal of 1097792691 is 1962977901.

It is a happy number.

It is not a de Polignac number, because 1097792691 - 2² = 1097792687 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1097792681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28051 + ... + 54611.

It is an arithmetic number, because the mean of its divisors is an integer number (95623200).

Almost surely, 2^1097792691 is an apocalyptic number.

1097792691 is a deficient number, since it is larger than the sum of its proper divisors (432178509).

1097792691 is a wasteful number, since it uses less digits than its factorization.

1097792691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27186.

The product of its (nonzero) digits is 428652, while the sum is 51.

The square root of 1097792691 is about 33132.9547580653. The cubic root of 1097792691 is about 1031.5891800084.

The spelling of 1097792691 in words is "one billion, ninety-seven million, seven hundred ninety-two thousand, six hundred ninety-one".