68990651 has 2 divisors, whose sum is σ = 68990652. Its totient is φ = 68990650.

The previous prime is 68990633. The next prime is 68990687. The reversal of 68990651 is 15609986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68990651 - 2⁶ = 68990587 is a prime.

It is not a weakly prime, because it can be changed into another prime (68990851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34495325 + 34495326.

It is an arithmetic number, because the mean of its divisors is an integer number (34495326).

Almost surely, 2^68990651 is an apocalyptic number.

68990651 is a deficient number, since it is larger than the sum of its proper divisors (1).

68990651 is an equidigital number, since it uses as much as digits as its factorization.

68990651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 68990651 is about 8306.0611001846. The cubic root of 68990651 is about 410.1380677181.

The spelling of 68990651 in words is "sixty-eight million, nine hundred ninety thousand, six hundred fifty-one".