11989983 has 16 divisors (see below), whose sum is σ = 16353792. Its totient is φ = 7812000.

The previous prime is 11989979. The next prime is 11989987. The reversal of 11989983 is 38998911.

It is an interprime number because it is at equal distance from previous prime (11989979) and next prime (11989987).

It is not a de Polignac number, because 11989983 - 2² = 11989979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38398 + ... + 38708.

It is an arithmetic number, because the mean of its divisors is an integer number (1022112).

Almost surely, 2^11989983 is an apocalyptic number.

11989983 is a deficient number, since it is larger than the sum of its proper divisors (4363809).

11989983 is a wasteful number, since it uses less digits than its factorization.

11989983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566.

The product of its digits is 139968, while the sum is 48.

The square root of 11989983 is about 3462.6554838736. The cubic root of 11989983 is about 228.8791274294.

The spelling of 11989983 in words is "eleven million, nine hundred eighty-nine thousand, nine hundred eighty-three".