3951223 has 4 divisors (see below), whose sum is σ = 3956848. Its totient is φ = 3945600.

The previous prime is 3951209. The next prime is 3951247. The reversal of 3951223 is 3221593.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3221593 = 61 ⋅52813.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3951223 is a prime.

It is a super-2 number, since 2×3951223² = 31224326391458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3951253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578 + ... + 3223.

It is an arithmetic number, because the mean of its divisors is an integer number (989212).

Almost surely, 2^3951223 is an apocalyptic number.

3951223 is a deficient number, since it is larger than the sum of its proper divisors (5625).

3951223 is an equidigital number, since it uses as much as digits as its factorization.

3951223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5624.

The product of its digits is 1620, while the sum is 25.

The square root of 3951223 is about 1987.7683466642. The cubic root of 3951223 is about 158.0922257060.

The spelling of 3951223 in words is "three million, nine hundred fifty-one thousand, two hundred twenty-three".