3951609 has 8 divisors (see below), whose sum is σ = 5301792. Its totient is φ = 2617920.

The previous prime is 3951587. The next prime is 3951611. The reversal of 3951609 is 9061593.

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

It is not a de Polignac number, because 3951609 - 2⁷ = 3951481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3951609.

It is not an unprimeable number, because it can be changed into a prime (3951109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3552 + ... + 4529.

It is an arithmetic number, because the mean of its divisors is an integer number (662724).

Almost surely, 2^3951609 is an apocalyptic number.

It is an amenable number.

3951609 is a deficient number, since it is larger than the sum of its proper divisors (1350183).

3951609 is a wasteful number, since it uses less digits than its factorization.

3951609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8247.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 3951609 is about 1987.8654381019. The cubic root of 3951609 is about 158.0973736152.

It can be divided in two parts, 3951 and 609, that added together give a triangular number (4560 = T₉₅).

The spelling of 3951609 in words is "three million, nine hundred fifty-one thousand, six hundred nine".