1097116409 has 2 divisors, whose sum is σ = 1097116410. Its totient is φ = 1097116408.

The previous prime is 1097116367. The next prime is 1097116421. The reversal of 1097116409 is 9046117901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 901200400 + 195916009 = 30020^2 + 13997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097116409 - 2²⁴ = 1080339193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1097116459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548558204 + 548558205.

It is an arithmetic number, because the mean of its divisors is an integer number (548558205).

Almost surely, 2^1097116409 is an apocalyptic number.

It is an amenable number.

1097116409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097116409 is an equidigital number, since it uses as much as digits as its factorization.

1097116409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 1097116409 is about 33122.7476064411. The cubic root of 1097116409 is about 1031.3773037871.

The spelling of 1097116409 in words is "one billion, ninety-seven million, one hundred sixteen thousand, four hundred nine".