3929945 has 8 divisors (see below), whose sum is σ = 4743360. Its totient is φ = 3125680.

The previous prime is 3929927. The next prime is 3929951. The reversal of 3929945 is 5499293.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3929945 - 2¹⁴ = 3913561 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301 + ... + 3090.

It is an arithmetic number, because the mean of its divisors is an integer number (592920).

Almost surely, 2^3929945 is an apocalyptic number.

It is an amenable number.

3929945 is a deficient number, since it is larger than the sum of its proper divisors (813415).

3929945 is a wasteful number, since it uses less digits than its factorization.

3929945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575.

The product of its digits is 87480, while the sum is 41.

The square root of 3929945 is about 1982.4088881964. The cubic root of 3929945 is about 157.8079303647.

The spelling of 3929945 in words is "three million, nine hundred twenty-nine thousand, nine hundred forty-five".