68440469 has 2 divisors, whose sum is σ = 68440470. Its totient is φ = 68440468.

The previous prime is 68440459. The next prime is 68440481. The reversal of 68440469 is 96404486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 11135569 = 7570^2 + 3337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68440469 is a prime.

It is a super-2 number, since 2×68440469² = 9368195593879922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68440459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34220234 + 34220235.

It is an arithmetic number, because the mean of its divisors is an integer number (34220235).

Almost surely, 2^68440469 is an apocalyptic number.

It is an amenable number.

68440469 is a deficient number, since it is larger than the sum of its proper divisors (1).

68440469 is an equidigital number, since it uses as much as digits as its factorization.

68440469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 68440469 is about 8272.8754976731. The cubic root of 68440469 is about 409.0449095140.

The spelling of 68440469 in words is "sixty-eight million, four hundred forty thousand, four hundred sixty-nine".