2196999 has 24 divisors (see below), whose sum is σ = 3715712. Its totient is φ = 1224720.

The previous prime is 2196979. The next prime is 2197021. The reversal of 2196999 is 9996912.

It is a happy number.

It is a Cunningham number, because it is equal to 130³-1.

It is not a de Polignac number, because 2196999 - 2⁵ = 2196967 is a prime.

2196999 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2304 + ... + 3114.

2^2196999 is an apocalyptic number.

2196999 is a deficient number, since it is larger than the sum of its proper divisors (1518713).

2196999 is a wasteful number, since it uses less digits than its factorization.

2196999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 864 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 2196999 is about 1482.2277152988. The cubic root of 2196999 is about 129.9999802761. Note that the first 4 decimals are identical.

It can be divided in two parts, 21 and 96999, that added together give a triangular number (97020 = T₄₄₀).

The spelling of 2196999 in words is "two million, one hundred ninety-six thousand, nine hundred ninety-nine".