3973139 has 2 divisors, whose sum is σ = 3973140. Its totient is φ = 3973138.

The previous prime is 3973133. The next prime is 3973153. The reversal of 3973139 is 9313793.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3973139 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3973099 and 3973108.

It is not a weakly prime, because it can be changed into another prime (3973133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986569 + 1986570.

It is an arithmetic number, because the mean of its divisors is an integer number (1986570).

Almost surely, 2^3973139 is an apocalyptic number.

3973139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3973139 is an equidigital number, since it uses as much as digits as its factorization.

3973139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15309, while the sum is 35.

The square root of 3973139 is about 1993.2734383421. The cubic root of 3973139 is about 158.3839803503.

The spelling of 3973139 in words is "three million, nine hundred seventy-three thousand, one hundred thirty-nine".