3423991 has 4 divisors (see below), whose sum is σ = 3480184. Its totient is φ = 3367800.

The previous prime is 3423983. The next prime is 3424019. The reversal of 3423991 is 1993243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1993243 = 7 ⋅284749.

It is a cyclic number.

It is not a de Polignac number, because 3423991 - 2³ = 3423983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3423191) 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, 28005 + ... + 28126.

It is an arithmetic number, because the mean of its divisors is an integer number (870046).

Almost surely, 2^3423991 is an apocalyptic number.

3423991 is a deficient number, since it is larger than the sum of its proper divisors (56193).

3423991 is an equidigital number, since it uses as much as digits as its factorization.

3423991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56192.

The product of its digits is 5832, while the sum is 31.

The square root of 3423991 is about 1850.4029290941. The cubic root of 3423991 is about 150.7223088095.

It can be divided in two parts, 34 and 23991, that added together give a square (24025 = 155²).

The spelling of 3423991 in words is "three million, four hundred twenty-three thousand, nine hundred ninety-one".