11902817 has 4 divisors (see below), whose sum is σ = 11918340. Its totient is φ = 11887296.

The previous prime is 11902811. The next prime is 11902819. The reversal of 11902817 is 71820911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71820911 = 6733 ⋅10667.

It can be written as a sum of positive squares in 2 ways, for example, as 9709456 + 2193361 = 3116^2 + 1481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11902817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11902817.

It is not an unprimeable number, because it can be changed into a prime (11902811) 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, 6548 + ... + 8165.

It is an arithmetic number, because the mean of its divisors is an integer number (2979585).

Almost surely, 2^11902817 is an apocalyptic number.

It is an amenable number.

11902817 is a deficient number, since it is larger than the sum of its proper divisors (15523).

11902817 is an equidigital number, since it uses as much as digits as its factorization.

11902817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15522.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 11902817 is about 3450.0459417231. The cubic root of 11902817 is about 228.3231349747.

The spelling of 11902817 in words is "eleven million, nine hundred two thousand, eight hundred seventeen".