68413529 has 4 divisors (see below), whose sum is σ = 69869184. Its totient is φ = 66957876.

The previous prime is 68413519. The next prime is 68413573. The reversal of 68413529 is 92531486.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92531486 = 2 ⋅46265743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68413529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68413492 and 68413501.

It is not an unprimeable number, because it can be changed into a prime (68413519) 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, 727757 + ... + 727850.

It is an arithmetic number, because the mean of its divisors is an integer number (17467296).

Almost surely, 2^68413529 is an apocalyptic number.

It is an amenable number.

68413529 is a deficient number, since it is larger than the sum of its proper divisors (1455655).

68413529 is a wasteful number, since it uses less digits than its factorization.

68413529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455654.

The product of its digits is 51840, while the sum is 38.

The square root of 68413529 is about 8271.2471248295. The cubic root of 68413529 is about 408.9912321297.

The spelling of 68413529 in words is "sixty-eight million, four hundred thirteen thousand, five hundred twenty-nine".