68889077 has 2 divisors, whose sum is σ = 68889078. Its totient is φ = 68889076.

The previous prime is 68889059. The next prime is 68889089. The reversal of 68889077 is 77098886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46977316 + 21911761 = 6854^2 + 4681^2 .

It is a cyclic number.

It is not a de Polignac number, because 68889077 - 2⁸ = 68888821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68889277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444538 + 34444539.

It is an arithmetic number, because the mean of its divisors is an integer number (34444539).

Almost surely, 2^68889077 is an apocalyptic number.

It is an amenable number.

68889077 is a deficient number, since it is larger than the sum of its proper divisors (1).

68889077 is an equidigital number, since it uses as much as digits as its factorization.

68889077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 68889077 is about 8299.9443974041. The cubic root of 68889077 is about 409.9366886179.

The spelling of 68889077 in words is "sixty-eight million, eight hundred eighty-nine thousand, seventy-seven".