10983991 has 2 divisors, whose sum is σ = 10983992. Its totient is φ = 10983990.

The previous prime is 10983983. The next prime is 10984003. The reversal of 10983991 is 19938901.

It is a weak prime.

It is an emirp because it is prime and its reverse (19938901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10983991 - 2³ = 10983983 is a prime.

It is a super-3 number, since 3×10983991³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10983391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5491995 + 5491996.

It is an arithmetic number, because the mean of its divisors is an integer number (5491996).

Almost surely, 2^10983991 is an apocalyptic number.

10983991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10983991 is an equidigital number, since it uses as much as digits as its factorization.

10983991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 10983991 is about 3314.2104640472. The cubic root of 10983991 is about 222.2900666831.

It can be divided in two parts, 109 and 83991, that added together give a square (84100 = 290²).

The spelling of 10983991 in words is "ten million, nine hundred eighty-three thousand, nine hundred ninety-one".