68202731 has 2 divisors, whose sum is σ = 68202732. Its totient is φ = 68202730.

The previous prime is 68202727. The next prime is 68202749. The reversal of 68202731 is 13720286.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68202731 - 2² = 68202727 is a prime.

It is a super-2 number, since 2×68202731² = 9303225031716722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68202694 and 68202703.

It is not a weakly prime, because it can be changed into another prime (68262731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34101365 + 34101366.

It is an arithmetic number, because the mean of its divisors is an integer number (34101366).

Almost surely, 2^68202731 is an apocalyptic number.

68202731 is a deficient number, since it is larger than the sum of its proper divisors (1).

68202731 is an equidigital number, since it uses as much as digits as its factorization.

68202731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 68202731 is about 8258.4944753871. The cubic root of 68202731 is about 408.5707342354.

The spelling of 68202731 in words is "sixty-eight million, two hundred two thousand, seven hundred thirty-one".