11651983 has 4 divisors (see below), whose sum is σ = 13316560. Its totient is φ = 9987408.

The previous prime is 11651977. The next prime is 11651993. The reversal of 11651983 is 38915611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38915611 = 7 ⋅5559373.

It is a cyclic number.

It is not a de Polignac number, because 11651983 - 2⁵ = 11651951 is a prime.

It is the 3414-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11651923) by changing a digit.

It is a nontrivial repunit in base 3413.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832278 + ... + 832291.

It is an arithmetic number, because the mean of its divisors is an integer number (3329140).

Almost surely, 2^11651983 is an apocalyptic number.

11651983 is a deficient number, since it is larger than the sum of its proper divisors (1664577).

11651983 is an equidigital number, since it uses as much as digits as its factorization.

11651983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664576.

The product of its digits is 6480, while the sum is 34.

The square root of 11651983 is about 3413.5001098579. The cubic root of 11651983 is about 226.7078791364.

The spelling of 11651983 in words is "eleven million, six hundred fifty-one thousand, nine hundred eighty-three".