438905911 has 2 divisors, whose sum is σ = 438905912. Its totient is φ = 438905910.

The previous prime is 438905867. The next prime is 438905917. The reversal of 438905911 is 119509834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438905911 - 2⁷ = 438905783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438905917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219452955 + 219452956.

It is an arithmetic number, because the mean of its divisors is an integer number (219452956).

Almost surely, 2^438905911 is an apocalyptic number.

438905911 is a deficient number, since it is larger than the sum of its proper divisors (1).

438905911 is an equidigital number, since it uses as much as digits as its factorization.

438905911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 438905911 is about 20950.0814079564. The cubic root of 438905911 is about 759.9595494399.

The spelling of 438905911 in words is "four hundred thirty-eight million, nine hundred five thousand, nine hundred eleven".