416320991 has 2 divisors, whose sum is σ = 416320992. Its totient is φ = 416320990.

The previous prime is 416320967. The next prime is 416321023. The reversal of 416320991 is 199023614.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 416320991 - 2¹⁸ = 416058847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (416320921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208160495 + 208160496.

It is an arithmetic number, because the mean of its divisors is an integer number (208160496).

Almost surely, 2^416320991 is an apocalyptic number.

416320991 is a deficient number, since it is larger than the sum of its proper divisors (1).

416320991 is an equidigital number, since it uses as much as digits as its factorization.

416320991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 416320991 is about 20403.9454763043. The cubic root of 416320991 is about 746.6941856044.

The spelling of 416320991 in words is "four hundred sixteen million, three hundred twenty thousand, nine hundred ninety-one".