3984951 has 4 divisors (see below), whose sum is σ = 5313272. Its totient is φ = 2656632.

The previous prime is 3984949. The next prime is 3984971. The reversal of 3984951 is 1594893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1594893 = 3 ⋅531631.

It is not a de Polignac number, because 3984951 - 2¹ = 3984949 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

3984951 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3984941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664156 + ... + 664161.

It is an arithmetic number, because the mean of its divisors is an integer number (1328318).

Almost surely, 2^3984951 is an apocalyptic number.

3984951 is a deficient number, since it is larger than the sum of its proper divisors (1328321).

3984951 is a wasteful number, since it uses less digits than its factorization.

3984951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328320.

The product of its digits is 38880, while the sum is 39.

The square root of 3984951 is about 1996.2342046964. The cubic root of 3984951 is about 158.5407816989.

The spelling of 3984951 in words is "three million, nine hundred eighty-four thousand, nine hundred fifty-one".