3973945 has 16 divisors (see below), whose sum is σ = 5112000. Its totient is φ = 2956608.

The previous prime is 3973943. The next prime is 3973973. The reversal of 3973945 is 5493793.

It is not a de Polignac number, because 3973945 - 2¹ = 3973943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3973898 and 3973907.

It is not an unprimeable number, because it can be changed into a prime (3973943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5251 + ... + 5959.

It is an arithmetic number, because the mean of its divisors is an integer number (319500).

Almost surely, 2^3973945 is an apocalyptic number.

It is an amenable number.

3973945 is a deficient number, since it is larger than the sum of its proper divisors (1138055).

3973945 is a wasteful number, since it uses less digits than its factorization.

3973945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792.

The product of its digits is 102060, while the sum is 40.

The square root of 3973945 is about 1993.4756080775. The cubic root of 3973945 is about 158.3946896708.

It can be divided in two parts, 39 and 73945, that added together give a square (73984 = 272²).

The spelling of 3973945 in words is "three million, nine hundred seventy-three thousand, nine hundred forty-five".