1011634189 has 4 divisors (see below), whose sum is σ = 1011780124. Its totient is φ = 1011488256.

The previous prime is 1011634171. The next prime is 1011634213. The reversal of 1011634189 is 9814361101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 390378564 + 621255625 = 19758^2 + 24925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011634189 - 2⁷ = 1011634061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011634889) 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, 62022 + ... + 76615.

It is an arithmetic number, because the mean of its divisors is an integer number (252945031).

Almost surely, 2^1011634189 is an apocalyptic number.

It is an amenable number.

1011634189 is a deficient number, since it is larger than the sum of its proper divisors (145935).

1011634189 is an equidigital number, since it uses as much as digits as its factorization.

1011634189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145934.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1011634189 is about 31806.1973363683. The cubic root of 1011634189 is about 1003.8631200859.

The spelling of 1011634189 in words is "one billion, eleven million, six hundred thirty-four thousand, one hundred eighty-nine".