68698691 has 2 divisors, whose sum is σ = 68698692. Its totient is φ = 68698690.

The previous prime is 68698673. The next prime is 68698703. The reversal of 68698691 is 19689686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68698691 - 2¹⁰ = 68697667 is a prime.

It is a super-2 number, since 2×68698691² = 9439020290226962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68698291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34349345 + 34349346.

It is an arithmetic number, because the mean of its divisors is an integer number (34349346).

Almost surely, 2^68698691 is an apocalyptic number.

68698691 is a deficient number, since it is larger than the sum of its proper divisors (1).

68698691 is an equidigital number, since it uses as much as digits as its factorization.

68698691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 53.

The square root of 68698691 is about 8288.4673492751. The cubic root of 68698691 is about 409.5586982885.

The spelling of 68698691 in words is "sixty-eight million, six hundred ninety-eight thousand, six hundred ninety-one".