68436623 has 4 divisors (see below), whose sum is σ = 70644288. Its totient is φ = 66228960.

The previous prime is 68436619. The next prime is 68436629. The reversal of 68436623 is 32663486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32663486 = 2 ⋅16331743.

It is a cyclic number.

It is not a de Polignac number, because 68436623 - 2² = 68436619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68436629) 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, 1103786 + ... + 1103847.

It is an arithmetic number, because the mean of its divisors is an integer number (17661072).

Almost surely, 2^68436623 is an apocalyptic number.

68436623 is a deficient number, since it is larger than the sum of its proper divisors (2207665).

68436623 is a wasteful number, since it uses less digits than its factorization.

68436623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207664.

The product of its digits is 124416, while the sum is 38.

The square root of 68436623 is about 8272.6430480228. The cubic root of 68436623 is about 409.0372473018.

The spelling of 68436623 in words is "sixty-eight million, four hundred thirty-six thousand, six hundred twenty-three".