68749969 has 2 divisors, whose sum is σ = 68749970. Its totient is φ = 68749968.

The previous prime is 68749963. The next prime is 68750021. The reversal of 68749969 is 96994786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67568400 + 1181569 = 8220^2 + 1087^2 .

It is a cyclic number.

It is not a de Polignac number, because 68749969 - 2⁷ = 68749841 is a prime.

It is a super-2 number, since 2×68749969² = 9453116475001922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68749963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34374984 + 34374985.

It is an arithmetic number, because the mean of its divisors is an integer number (34374985).

Almost surely, 2^68749969 is an apocalyptic number.

It is an amenable number.

68749969 is a deficient number, since it is larger than the sum of its proper divisors (1).

68749969 is an equidigital number, since it uses as much as digits as its factorization.

68749969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 58.

The square root of 68749969 is about 8291.5601065180. The cubic root of 68749969 is about 409.6605737271.

The spelling of 68749969 in words is "sixty-eight million, seven hundred forty-nine thousand, nine hundred sixty-nine".