406755991 has 16 divisors (see below), whose sum is σ = 451899648. Its totient is φ = 364377600.

The previous prime is 406755977. The next prime is 406755997. The reversal of 406755991 is 199557604.

It is a cyclic number.

It is not a de Polignac number, because 406755991 - 2⁵ = 406755959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406755997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25821 + ... + 38473.

It is an arithmetic number, because the mean of its divisors is an integer number (28243728).

Almost surely, 2^406755991 is an apocalyptic number.

406755991 is a deficient number, since it is larger than the sum of its proper divisors (45143657).

406755991 is a wasteful number, since it uses less digits than its factorization.

406755991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12762.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 406755991 is about 20168.1925565976. The cubic root of 406755991 is about 740.9313759607.

The spelling of 406755991 in words is "four hundred six million, seven hundred fifty-five thousand, nine hundred ninety-one".