1009000181 has 4 divisors (see below), whose sum is σ = 1153143072. Its totient is φ = 864857292.

The previous prime is 1009000177. The next prime is 1009000189. The reversal of 1009000181 is 1810009001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1009000181 - 2² = 1009000177 is a prime.

It is a super-2 number, since 2×1009000181² = 2036162730516065522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009000189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72071435 + ... + 72071448.

It is an arithmetic number, because the mean of its divisors is an integer number (288285768).

Almost surely, 2^1009000181 is an apocalyptic number.

It is an amenable number.

1009000181 is a deficient number, since it is larger than the sum of its proper divisors (144142891).

1009000181 is an equidigital number, since it uses as much as digits as its factorization.

1009000181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144142890.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1009000181 is about 31764.7631976062. The cubic root of 1009000181 is about 1002.9911047058.

Adding to 1009000181 its reverse (1810009001), we get a palindrome (2819009182).

The spelling of 1009000181 in words is "one billion, nine million, one hundred eighty-one", and thus it is an aban number.