400885091 has 2 divisors, whose sum is σ = 400885092. Its totient is φ = 400885090.

The previous prime is 400885081. The next prime is 400885097. The reversal of 400885091 is 190588004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400885091 - 2²⁶ = 333776227 is a prime.

It is not a weakly prime, because it can be changed into another prime (400885097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200442545 + 200442546.

It is an arithmetic number, because the mean of its divisors is an integer number (200442546).

Almost surely, 2^400885091 is an apocalyptic number.

400885091 is a deficient number, since it is larger than the sum of its proper divisors (1).

400885091 is an equidigital number, since it uses as much as digits as its factorization.

400885091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 400885091 is about 20022.1150481162. The cubic root of 400885091 is about 737.3493499047.

The spelling of 400885091 in words is "four hundred million, eight hundred eighty-five thousand, ninety-one".