6973639 has 2 divisors, whose sum is σ = 6973640. Its totient is φ = 6973638.

The previous prime is 6973619. The next prime is 6973651. The reversal of 6973639 is 9363796.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6973639 - 2¹⁷ = 6842567 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6973595 and 6973604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6973609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3486819 + 3486820.

It is an arithmetic number, because the mean of its divisors is an integer number (3486820).

Almost surely, 2^6973639 is an apocalyptic number.

6973639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6973639 is an equidigital number, since it uses as much as digits as its factorization.

6973639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 43.

The square root of 6973639 is about 2640.7648513262. The cubic root of 6973639 is about 191.0526886978.

The spelling of 6973639 in words is "six million, nine hundred seventy-three thousand, six hundred thirty-nine".