68490277 has 2 divisors, whose sum is σ = 68490278. Its totient is φ = 68490276.

The previous prime is 68490239. The next prime is 68490287. The reversal of 68490277 is 77209486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66569281 + 1920996 = 8159^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 68490277 - 2¹⁵ = 68457509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68490287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34245138 + 34245139.

It is an arithmetic number, because the mean of its divisors is an integer number (34245139).

Almost surely, 2^68490277 is an apocalyptic number.

It is an amenable number.

68490277 is a deficient number, since it is larger than the sum of its proper divisors (1).

68490277 is an equidigital number, since it uses as much as digits as its factorization.

68490277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 68490277 is about 8275.8852698669. The cubic root of 68490277 is about 409.1441138238.

The spelling of 68490277 in words is "sixty-eight million, four hundred ninety thousand, two hundred seventy-seven".