920109101909 has 8 divisors (see below), whose sum is σ = 938180713752. Its totient is φ = 902133872640.

The previous prime is 920109101897. The next prime is 920109101921. The reversal of 920109101909 is 909101901029.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (920109101897) and next prime (920109101921).

It can be written as a sum of positive squares in 4 ways, for example, as 3666665809 + 916442436100 = 60553^2 + 957310^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 920109101909 - 2²⁴ = 920092324693 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 (920109101959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24076364 + ... + 24114549.

It is an arithmetic number, because the mean of its divisors is an integer number (117272589219).

Almost surely, 2^920109101909 is an apocalyptic number.

It is an amenable number.

920109101909 is a deficient number, since it is larger than the sum of its proper divisors (18071611843).

920109101909 is a wasteful number, since it uses less digits than its factorization.

920109101909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48191287.

The product of its (nonzero) digits is 13122, while the sum is 41.

It can be divided in two parts, 92010 and 9101909, that added together give a palindrome (9193919).

The spelling of 920109101909 in words is "nine hundred twenty billion, one hundred nine million, one hundred one thousand, nine hundred nine".