1005606109 has 2 divisors, whose sum is σ = 1005606110. Its totient is φ = 1005606108.

The previous prime is 1005606101. The next prime is 1005606137. The reversal of 1005606109 is 9016065001.

It is an a-pointer prime, because the next prime (1005606137) can be obtained adding 1005606109 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 968578884 + 37027225 = 31122^2 + 6085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005606109 - 2³ = 1005606101 is a prime.

It is a super-2 number, since 2×1005606109² = 2022487292916239762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005606101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502803054 + 502803055.

It is an arithmetic number, because the mean of its divisors is an integer number (502803055).

Almost surely, 2^1005606109 is an apocalyptic number.

It is an amenable number.

1005606109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005606109 is an equidigital number, since it uses as much as digits as its factorization.

1005606109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1005606109 is about 31711.2930830643. The cubic root of 1005606109 is about 1001.8652217846.

The spelling of 1005606109 in words is "one billion, five million, six hundred six thousand, one hundred nine".