68087977 has 2 divisors, whose sum is σ = 68087978. Its totient is φ = 68087976.

The previous prime is 68087953. The next prime is 68087983. The reversal of 68087977 is 77978086.

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., 54405376 + 13682601 = 7376^2 + 3699^2 .

It is a cyclic number.

It is not a de Polignac number, because 68087977 - 2¹¹ = 68085929 is a prime.

It is a super-2 number, since 2×68087977² = 9271945223905058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68087077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34043988 + 34043989.

It is an arithmetic number, because the mean of its divisors is an integer number (34043989).

Almost surely, 2^68087977 is an apocalyptic number.

It is an amenable number.

68087977 is a deficient number, since it is larger than the sum of its proper divisors (1).

68087977 is an equidigital number, since it uses as much as digits as its factorization.

68087977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 68087977 is about 8251.5439161408. The cubic root of 68087977 is about 408.3414597115.

The spelling of 68087977 in words is "sixty-eight million, eighty-seven thousand, nine hundred seventy-seven".