68774977 has 2 divisors, whose sum is σ = 68774978. Its totient is φ = 68774976.

The previous prime is 68774947. The next prime is 68774983. The reversal of 68774977 is 77947786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47761921 + 21013056 = 6911^2 + 4584^2 .

It is a cyclic number.

It is not a de Polignac number, because 68774977 - 2¹¹ = 68772929 is a prime.

It is a super-2 number, since 2×68774977² = 9459994922701058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68774947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34387488 + 34387489.

It is an arithmetic number, because the mean of its divisors is an integer number (34387489).

Almost surely, 2^68774977 is an apocalyptic number.

It is an amenable number.

68774977 is a deficient number, since it is larger than the sum of its proper divisors (1).

68774977 is an equidigital number, since it uses as much as digits as its factorization.

68774977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 55.

The square root of 68774977 is about 8293.0680088855. The cubic root of 68774977 is about 409.7102394449.

It can be divided in two parts, 68774 and 977, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 68774977 in words is "sixty-eight million, seven hundred seventy-four thousand, nine hundred seventy-seven".