406445687 has 2 divisors, whose sum is σ = 406445688. Its totient is φ = 406445686.

The previous prime is 406445657. The next prime is 406445717. The reversal of 406445687 is 786544604.

It is a balanced prime because it is at equal distance from previous prime (406445657) and next prime (406445717).

It is a cyclic number.

It is not a de Polignac number, because 406445687 - 2¹² = 406441591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406445657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203222843 + 203222844.

It is an arithmetic number, because the mean of its divisors is an integer number (203222844).

Almost surely, 2^406445687 is an apocalyptic number.

406445687 is a deficient number, since it is larger than the sum of its proper divisors (1).

406445687 is an equidigital number, since it uses as much as digits as its factorization.

406445687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 44.

The square root of 406445687 is about 20160.4981833287. The cubic root of 406445687 is about 740.7429153399.

The spelling of 406445687 in words is "four hundred six million, four hundred forty-five thousand, six hundred eighty-seven".