321111887 has 2 divisors, whose sum is σ = 321111888. Its totient is φ = 321111886.

The previous prime is 321111881. The next prime is 321111941. The reversal of 321111887 is 788111123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321111887 - 2¹² = 321107791 is a prime.

It is a super-2 number, since 2×321111887² = 206225687945401538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321111881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160555943 + 160555944.

It is an arithmetic number, because the mean of its divisors is an integer number (160555944).

Almost surely, 2^321111887 is an apocalyptic number.

321111887 is a deficient number, since it is larger than the sum of its proper divisors (1).

321111887 is an equidigital number, since it uses as much as digits as its factorization.

321111887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 32.

The square root of 321111887 is about 17919.5950568086. The cubic root of 321111887 is about 684.7816712336.

The spelling of 321111887 in words is "three hundred twenty-one million, one hundred eleven thousand, eight hundred eighty-seven".