68377081 has 2 divisors, whose sum is σ = 68377082. Its totient is φ = 68377080.

The previous prime is 68377063. The next prime is 68377087. The reversal of 68377081 is 18077386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42367081 + 26010000 = 6509^2 + 5100^2 .

It is a cyclic number.

It is not a de Polignac number, because 68377081 - 2⁹ = 68376569 is a prime.

It is a super-2 number, since 2×68377081² = 9350850412161122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68377087) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34188540 + 34188541.

It is an arithmetic number, because the mean of its divisors is an integer number (34188541).

Almost surely, 2^68377081 is an apocalyptic number.

It is an amenable number.

68377081 is a deficient number, since it is larger than the sum of its proper divisors (1).

68377081 is an equidigital number, since it uses as much as digits as its factorization.

68377081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 68377081 is about 8269.0435359841. The cubic root of 68377081 is about 408.9185878214.

The spelling of 68377081 in words is "sixty-eight million, three hundred seventy-seven thousand, eighty-one".