407639 has 2 divisors, whose sum is σ = 407640. Its totient is φ = 407638.

The previous prime is 407633. The next prime is 407651. The reversal of 407639 is 936704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 407639 - 2⁸ = 407383 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 407639.

It is not a weakly prime, because it can be changed into another prime (407633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203819 + 203820.

It is an arithmetic number, because the mean of its divisors is an integer number (203820).

2⁴⁰⁷⁶³⁹ is an apocalyptic number.

407639 is a deficient number, since it is larger than the sum of its proper divisors (1).

407639 is an equidigital number, since it uses as much as digits as its factorization.

407639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 407639 is about 638.4661306600. The cubic root of 407639 is about 74.1467140425.

The spelling of 407639 in words is "four hundred seven thousand, six hundred thirty-nine".