68690753 has 2 divisors, whose sum is σ = 68690754. Its totient is φ = 68690752.

The previous prime is 68690749. The next prime is 68690771. The reversal of 68690753 is 35709686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68674369 + 16384 = 8287^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 68690753 - 2² = 68690749 is a prime.

It is a super-3 number, since 3×68690753³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (68690723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34345376 + 34345377.

It is an arithmetic number, because the mean of its divisors is an integer number (34345377).

Almost surely, 2^68690753 is an apocalyptic number.

It is an amenable number.

68690753 is a deficient number, since it is larger than the sum of its proper divisors (1).

68690753 is an equidigital number, since it uses as much as digits as its factorization.

68690753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 68690753 is about 8287.9884773086. The cubic root of 68690753 is about 409.5429231108.

The spelling of 68690753 in words is "sixty-eight million, six hundred ninety thousand, seven hundred fifty-three".