406550687 has 2 divisors, whose sum is σ = 406550688. Its totient is φ = 406550686.

The previous prime is 406550671. The next prime is 406550689. The reversal of 406550687 is 786055604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406550687 - 2⁴ = 406550671 is a prime.

It is a super-2 number, since 2×406550687² = 330566922200343938, which contains 22 as substring.

Together with 406550689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406550689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203275343 + 203275344.

It is an arithmetic number, because the mean of its divisors is an integer number (203275344).

Almost surely, 2^406550687 is an apocalyptic number.

406550687 is a deficient number, since it is larger than the sum of its proper divisors (1).

406550687 is an equidigital number, since it uses as much as digits as its factorization.

406550687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 406550687 is about 20163.1021174818. The cubic root of 406550687 is about 740.8066969733.

The spelling of 406550687 in words is "four hundred six million, five hundred fifty thousand, six hundred eighty-seven".