68389967 has 4 divisors (see below), whose sum is σ = 69511176. Its totient is φ = 67268760.

The previous prime is 68389943. The next prime is 68390011. The reversal of 68389967 is 76998386.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68389967 - 2¹² = 68385871 is a prime.

It is a super-2 number, since 2×68389967² = 9354375172522178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68389067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560513 + ... + 560634.

It is an arithmetic number, because the mean of its divisors is an integer number (17377794).

Almost surely, 2^68389967 is an apocalyptic number.

68389967 is a deficient number, since it is larger than the sum of its proper divisors (1121209).

68389967 is a wasteful number, since it uses less digits than its factorization.

68389967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121208.

The product of its digits is 3919104, while the sum is 56.

The square root of 68389967 is about 8269.8226704084. The cubic root of 68389967 is about 408.9442737865.

The spelling of 68389967 in words is "sixty-eight million, three hundred eighty-nine thousand, nine hundred sixty-seven".