1099997 has 2 divisors, whose sum is σ = 1099998. Its totient is φ = 1099996.

The previous prime is 1099961. The next prime is 1100009. The reversal of 1099997 is 7999901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 948676 + 151321 = 974^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1099997 - 2⁶ = 1099933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549998 + 549999.

It is an arithmetic number, because the mean of its divisors is an integer number (549999).

2^1099997 is an apocalyptic number.

It is an amenable number.

1099997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099997 is an equidigital number, since it uses as much as digits as its factorization.

1099997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 1099997 is about 1048.8074179753. The cubic root of 1099997 is about 103.2279177019.

The spelling of 1099997 in words is "one million, ninety-nine thousand, nine hundred ninety-seven".