1011172829 has 4 divisors (see below), whose sum is σ = 1016305884. Its totient is φ = 1006039776.

The previous prime is 1011172823. The next prime is 1011172831. The reversal of 1011172829 is 9282711101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9282711101 = 80071 ⋅115931.

It can be written as a sum of positive squares in 2 ways, for example, as 992880100 + 18292729 = 31510^2 + 4277^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011172829 - 2²⁰ = 1010124253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011172795 and 1011172804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011172823) 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, 2566232 + ... + 2566625.

It is an arithmetic number, because the mean of its divisors is an integer number (254076471).

Almost surely, 2^1011172829 is an apocalyptic number.

It is an amenable number.

1011172829 is a deficient number, since it is larger than the sum of its proper divisors (5133055).

1011172829 is an equidigital number, since it uses as much as digits as its factorization.

1011172829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133054.

The product of its (nonzero) digits is 2016, while the sum is 32.

The square root of 1011172829 is about 31798.9438346622. The cubic root of 1011172829 is about 1003.7104915574.

The spelling of 1011172829 in words is "one billion, eleven million, one hundred seventy-two thousand, eight hundred twenty-nine".