3972929 has 4 divisors (see below), whose sum is σ = 4101120. Its totient is φ = 3844740.

The previous prime is 3972923. The next prime is 3972931. The reversal of 3972929 is 9292793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3972929 - 2²⁰ = 2924353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3972923) 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, 64049 + ... + 64110.

It is an arithmetic number, because the mean of its divisors is an integer number (1025280).

Almost surely, 2^3972929 is an apocalyptic number.

It is an amenable number.

3972929 is a deficient number, since it is larger than the sum of its proper divisors (128191).

3972929 is a wasteful number, since it uses less digits than its factorization.

3972929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128190.

The product of its digits is 61236, while the sum is 41.

The square root of 3972929 is about 1993.2207604779. The cubic root of 3972929 is about 158.3811898429.

The spelling of 3972929 in words is "three million, nine hundred seventy-two thousand, nine hundred twenty-nine".