867477881 has 2 divisors, whose sum is σ = 867477882. Its totient is φ = 867477880.

The previous prime is 867477859. The next prime is 867477883. The reversal of 867477881 is 188774768.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 768176656 + 99301225 = 27716^2 + 9965^2 .

It is a cyclic number.

It is not a de Polignac number, because 867477881 - 2⁶ = 867477817 is a prime.

It is a super-2 number, since 2×867477881² = 1505035748048500322, which contains 22 as substring.

Together with 867477883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (867477883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433738940 + 433738941.

It is an arithmetic number, because the mean of its divisors is an integer number (433738941).

Almost surely, 2^867477881 is an apocalyptic number.

It is an amenable number.

867477881 is a deficient number, since it is larger than the sum of its proper divisors (1).

867477881 is an equidigital number, since it uses as much as digits as its factorization.

867477881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4214784, while the sum is 56.

The square root of 867477881 is about 29452.9774555986. The cubic root of 867477881 is about 953.7168813703.

The spelling of 867477881 in words is "eight hundred sixty-seven million, four hundred seventy-seven thousand, eight hundred eighty-one".