68646829 has 4 divisors (see below), whose sum is σ = 72259840. Its totient is φ = 65033820.

The previous prime is 68646797. The next prime is 68646863. The reversal of 68646829 is 92864686.

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.

It is a cyclic number.

It is not a de Polignac number, because 68646829 - 2⁵ = 68646797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68641829) 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, 1806477 + ... + 1806514.

It is an arithmetic number, because the mean of its divisors is an integer number (18064960).

Almost surely, 2^68646829 is an apocalyptic number.

It is an amenable number.

68646829 is a deficient number, since it is larger than the sum of its proper divisors (3613011).

68646829 is a wasteful number, since it uses less digits than its factorization.

68646829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613010.

The product of its digits is 995328, while the sum is 49.

The square root of 68646829 is about 8285.3381946665. The cubic root of 68646829 is about 409.4556110238.

The spelling of 68646829 in words is "sixty-eight million, six hundred forty-six thousand, eight hundred twenty-nine".