3993951 has 8 divisors (see below), whose sum is σ = 5734960. Its totient is φ = 2457792.

The previous prime is 3993949. The next prime is 3993953. The reversal of 3993951 is 1593993.

It is an interprime number because it is at equal distance from previous prime (3993949) and next prime (3993953).

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

It is not a de Polignac number, because 3993951 - 2¹ = 3993949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 102409 = 3993951 / (3 + 9 + 9 + 3 + 9 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993953) 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, 51166 + ... + 51243.

It is an arithmetic number, because the mean of its divisors is an integer number (716870).

Almost surely, 2^3993951 is an apocalyptic number.

3993951 is a deficient number, since it is larger than the sum of its proper divisors (1741009).

3993951 is a wasteful number, since it uses less digits than its factorization.

3993951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102425.

The product of its digits is 32805, while the sum is 39.

The square root of 3993951 is about 1998.4871778423. The cubic root of 3993951 is about 158.6600465857.

The spelling of 3993951 in words is "three million, nine hundred ninety-three thousand, nine hundred fifty-one".