2399929 has 4 divisors (see below), whose sum is σ = 2742784. Its totient is φ = 2057076.

The previous prime is 2399921. The next prime is 2399933. The reversal of 2399929 is 9299932.

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 2399929 - 2³ = 2399921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2399921) 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, 171417 + ... + 171430.

It is an arithmetic number, because the mean of its divisors is an integer number (685696).

2^2399929 is an apocalyptic number.

It is an amenable number.

2399929 is a deficient number, since it is larger than the sum of its proper divisors (342855).

2399929 is an equidigital number, since it uses as much as digits as its factorization.

2399929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342854.

The product of its digits is 78732, while the sum is 43.

The square root of 2399929 is about 1549.1704231620. The cubic root of 2399929 is about 133.8852697329.

The spelling of 2399929 in words is "two million, three hundred ninety-nine thousand, nine hundred twenty-nine".