68950813 has 2 divisors, whose sum is σ = 68950814. Its totient is φ = 68950812.

The previous prime is 68950799. The next prime is 68950831. The reversal of 68950813 is 31805986.

It is a happy number.

Together with next prime (68950831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63011844 + 5938969 = 7938^2 + 2437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68950813 is a prime.

It is a super-2 number, since 2×68950813² = 9508429226721938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68950213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34475406 + 34475407.

It is an arithmetic number, because the mean of its divisors is an integer number (34475407).

Almost surely, 2^68950813 is an apocalyptic number.

It is an amenable number.

68950813 is a deficient number, since it is larger than the sum of its proper divisors (1).

68950813 is an equidigital number, since it uses as much as digits as its factorization.

68950813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 68950813 is about 8303.6626256129. The cubic root of 68950813 is about 410.0591090667.

The spelling of 68950813 in words is "sixty-eight million, nine hundred fifty thousand, eight hundred thirteen".