11890023617 has 2 divisors, whose sum is σ = 11890023618. Its totient is φ = 11890023616.

The previous prime is 11890023529. The next prime is 11890023679. The reversal of 11890023617 is 71632009811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9992201521 + 1897822096 = 99961^2 + 43564^2 .

It is a cyclic number.

It is not a de Polignac number, because 11890023617 - 2¹⁰ = 11890022593 is a prime.

It is a super-2 number, since 2×11890023617² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11890020617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945011808 + 5945011809.

It is an arithmetic number, because the mean of its divisors is an integer number (5945011809).

Almost surely, 2^11890023617 is an apocalyptic number.

It is an amenable number.

11890023617 is a deficient number, since it is larger than the sum of its proper divisors (1).

11890023617 is an equidigital number, since it uses as much as digits as its factorization.

11890023617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 11890023617 in words is "eleven billion, eight hundred ninety million, twenty-three thousand, six hundred seventeen".