1090999997 has 2 divisors, whose sum is σ = 1090999998. Its totient is φ = 1090999996.

The previous prime is 1090999991. The next prime is 1091000017. The reversal of 1090999997 is 7999990901.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783664036 + 307335961 = 27994^2 + 17531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090999997 - 2²⁴ = 1074222781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1090999991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545499998 + 545499999.

It is an arithmetic number, because the mean of its divisors is an integer number (545499999).

Almost surely, 2^1090999997 is an apocalyptic number.

It is an amenable number.

1090999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090999997 is an equidigital number, since it uses as much as digits as its factorization.

1090999997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3720087, while the sum is 62.

The square root of 1090999997 is about 33030.2890844146. The cubic root of 1090999997 is about 1029.4570918984.

The spelling of 1090999997 in words is "one billion, ninety million, nine hundred ninety-nine thousand, nine hundred ninety-seven".