68153771 has 4 divisors (see below), whose sum is σ = 77890032. Its totient is φ = 58417512.

The previous prime is 68153759. The next prime is 68153773. The reversal of 68153771 is 17735186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68153771 - 2¹⁸ = 67891627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68153773) 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, 4868120 + ... + 4868133.

It is an arithmetic number, because the mean of its divisors is an integer number (19472508).

Almost surely, 2^68153771 is an apocalyptic number.

68153771 is a deficient number, since it is larger than the sum of its proper divisors (9736261).

68153771 is an equidigital number, since it uses as much as digits as its factorization.

68153771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9736260.

The product of its digits is 35280, while the sum is 38.

The square root of 68153771 is about 8255.5297225557. The cubic root of 68153771 is about 408.4729453280.

The spelling of 68153771 in words is "sixty-eight million, one hundred fifty-three thousand, seven hundred seventy-one".