3969951 has 8 divisors (see below), whose sum is σ = 5372544. Its totient is φ = 2607000.

The previous prime is 3969943. The next prime is 3969971. The reversal of 3969951 is 1599693.

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

It is not a de Polignac number, because 3969951 - 2³ = 3969943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969971) 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, 9675 + ... + 10076.

It is an arithmetic number, because the mean of its divisors is an integer number (671568).

Almost surely, 2^3969951 is an apocalyptic number.

3969951 is a deficient number, since it is larger than the sum of its proper divisors (1402593).

3969951 is a wasteful number, since it uses less digits than its factorization.

3969951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19821.

The product of its digits is 65610, while the sum is 42.

The square root of 3969951 is about 1992.4735882817. The cubic root of 3969951 is about 158.3416072008.

The spelling of 3969951 in words is "three million, nine hundred sixty-nine thousand, nine hundred fifty-one".