3978951 has 8 divisors (see below), whose sum is σ = 5322624. Its totient is φ = 2643960.

The previous prime is 3978917. The next prime is 3978967. The reversal of 3978951 is 1598793.

It is a happy number.

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

It is not a de Polignac number, because 3978951 - 2⁷ = 3978823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978971) 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, 1011 + ... + 2996.

It is an arithmetic number, because the mean of its divisors is an integer number (665328).

Almost surely, 2^3978951 is an apocalyptic number.

3978951 is a deficient number, since it is larger than the sum of its proper divisors (1343673).

3978951 is a wasteful number, since it uses less digits than its factorization.

3978951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341.

The product of its digits is 68040, while the sum is 42.

The square root of 3978951 is about 1994.7308089063. The cubic root of 3978951 is about 158.4611719782.

The spelling of 3978951 in words is "three million, nine hundred seventy-eight thousand, nine hundred fifty-one".