1097809019 has 2 divisors, whose sum is σ = 1097809020. Its totient is φ = 1097809018.

The previous prime is 1097808997. The next prime is 1097809039. The reversal of 1097809019 is 9109087901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1097809019 - 2⁸ = 1097808763 is a prime.

It is a super-2 number, since 2×1097809019² = 2410369284395484722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1097809039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548904509 + 548904510.

It is an arithmetic number, because the mean of its divisors is an integer number (548904510).

Almost surely, 2^1097809019 is an apocalyptic number.

1097809019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097809019 is an equidigital number, since it uses as much as digits as its factorization.

1097809019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 1097809019 is about 33133.2011583547. The cubic root of 1097809019 is about 1031.5942944242.

The spelling of 1097809019 in words is "one billion, ninety-seven million, eight hundred nine thousand, nineteen".