406610639 has 2 divisors, whose sum is σ = 406610640. Its totient is φ = 406610638.

The previous prime is 406610597. The next prime is 406610669. The reversal of 406610639 is 936016604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406610639 - 2²⁸ = 138175183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 406610599 and 406610608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406610669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203305319 + 203305320.

It is an arithmetic number, because the mean of its divisors is an integer number (203305320).

Almost surely, 2^406610639 is an apocalyptic number.

406610639 is a deficient number, since it is larger than the sum of its proper divisors (1).

406610639 is an equidigital number, since it uses as much as digits as its factorization.

406610639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 406610639 is about 20164.5887386775. The cubic root of 406610639 is about 740.8431095385.

The spelling of 406610639 in words is "four hundred six million, six hundred ten thousand, six hundred thirty-nine".