2188929 has 4 divisors (see below), whose sum is σ = 2918576. Its totient is φ = 1459284.

The previous prime is 2188919. The next prime is 2188981. The reversal of 2188929 is 9298812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2188929 - 2⁴ = 2188913 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2188909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364819 + ... + 364824.

It is an arithmetic number, because the mean of its divisors is an integer number (729644).

2^2188929 is an apocalyptic number.

It is an amenable number.

2188929 is a deficient number, since it is larger than the sum of its proper divisors (729647).

2188929 is an equidigital number, since it uses as much as digits as its factorization.

2188929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729646.

The product of its digits is 20736, while the sum is 39.

The square root of 2188929 is about 1479.5029570771. The cubic root of 2188929 is about 129.8406133422.

The spelling of 2188929 in words is "two million, one hundred eighty-eight thousand, nine hundred twenty-nine".