1097708881 has 2 divisors, whose sum is σ = 1097708882. Its totient is φ = 1097708880.

The previous prime is 1097708851. The next prime is 1097708951. The reversal of 1097708881 is 1888077901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030731025 + 66977856 = 32105^2 + 8184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097708881 - 2⁵ = 1097708849 is a prime.

It is a super-2 number, since 2×1097708881² = 2409929574852544322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1097708851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548854440 + 548854441.

It is an arithmetic number, because the mean of its divisors is an integer number (548854441).

Almost surely, 2^1097708881 is an apocalyptic number.

It is an amenable number.

1097708881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097708881 is an equidigital number, since it uses as much as digits as its factorization.

1097708881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 49.

The square root of 1097708881 is about 33131.6899810438. The cubic root of 1097708881 is about 1031.5629274229.

The spelling of 1097708881 in words is "one billion, ninety-seven million, seven hundred eight thousand, eight hundred eighty-one".