68281929 has 24 divisors (see below), whose sum is σ = 101237760. Its totient is φ = 44327808.

The previous prime is 68281919. The next prime is 68281949. The reversal of 68281929 is 92918286.

It is not a de Polignac number, because 68281929 - 2¹⁵ = 68249161 is a prime.

It is a super-2 number, since 2×68281929² = 9324843655922082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68281919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142312 + ... + 142790.

It is an arithmetic number, because the mean of its divisors is an integer number (4218240).

Almost surely, 2^68281929 is an apocalyptic number.

It is an amenable number.

68281929 is a deficient number, since it is larger than the sum of its proper divisors (32955831).

68281929 is a wasteful number, since it uses less digits than its factorization.

68281929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 866 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 68281929 is about 8263.2880259616. The cubic root of 68281929 is about 408.7288191477.

The spelling of 68281929 in words is "sixty-eight million, two hundred eighty-one thousand, nine hundred twenty-nine".