10406639 has 2 divisors, whose sum is σ = 10406640. Its totient is φ = 10406638.

The previous prime is 10406633. The next prime is 10406651. The reversal of 10406639 is 93660401.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10406639 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10406633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5203319 + 5203320.

It is an arithmetic number, because the mean of its divisors is an integer number (5203320).

Almost surely, 2^10406639 is an apocalyptic number.

10406639 is a deficient number, since it is larger than the sum of its proper divisors (1).

10406639 is an equidigital number, since it uses as much as digits as its factorization.

10406639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 10406639 is about 3225.9322683528. The cubic root of 10406639 is about 218.3250138948.

The spelling of 10406639 in words is "ten million, four hundred six thousand, six hundred thirty-nine".