406621087 has 2 divisors, whose sum is σ = 406621088. Its totient is φ = 406621086.

The previous prime is 406621081. The next prime is 406621123. The reversal of 406621087 is 780126604.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406621087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406621081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203310543 + 203310544.

It is an arithmetic number, because the mean of its divisors is an integer number (203310544).

Almost surely, 2^406621087 is an apocalyptic number.

406621087 is a deficient number, since it is larger than the sum of its proper divisors (1).

406621087 is an equidigital number, since it uses as much as digits as its factorization.

406621087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 406621087 is about 20164.8478050294. The cubic root of 406621087 is about 740.8494548902.

The spelling of 406621087 in words is "four hundred six million, six hundred twenty-one thousand, eighty-seven".