68891423 has 2 divisors, whose sum is σ = 68891424. Its totient is φ = 68891422.

The previous prime is 68891419. The next prime is 68891453. The reversal of 68891423 is 32419886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68891423 - 2² = 68891419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68891413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34445711 + 34445712.

It is an arithmetic number, because the mean of its divisors is an integer number (34445712).

Almost surely, 2^68891423 is an apocalyptic number.

68891423 is a deficient number, since it is larger than the sum of its proper divisors (1).

68891423 is an equidigital number, since it uses as much as digits as its factorization.

68891423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 68891423 is about 8300.0857224489. The cubic root of 68891423 is about 409.9413419950.

The spelling of 68891423 in words is "sixty-eight million, eight hundred ninety-one thousand, four hundred twenty-three".