68642929 has 4 divisors (see below), whose sum is σ = 68790384. Its totient is φ = 68495476.

The previous prime is 68642887. The next prime is 68642947. The reversal of 68642929 is 92924686.

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 68642929 - 2¹¹ = 68640881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68642129) 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, 73027 + ... + 73960.

It is an arithmetic number, because the mean of its divisors is an integer number (17197596).

Almost surely, 2^68642929 is an apocalyptic number.

It is an amenable number.

68642929 is a deficient number, since it is larger than the sum of its proper divisors (147455).

68642929 is a wasteful number, since it uses less digits than its factorization.

68642929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147454.

The product of its digits is 373248, while the sum is 46.

The square root of 68642929 is about 8285.1028358132. The cubic root of 68642929 is about 409.4478568073.

The spelling of 68642929 in words is "sixty-eight million, six hundred forty-two thousand, nine hundred twenty-nine".