68239771 has 4 divisors (see below), whose sum is σ = 69006600. Its totient is φ = 67472944.

The previous prime is 68239763. The next prime is 68239789. The reversal of 68239771 is 17793286.

It is a happy number.

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 68239771 - 2³ = 68239763 is a prime.

It is a super-2 number, since 2×68239771² = 9313332692264882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68239271) 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, 383281 + ... + 383458.

It is an arithmetic number, because the mean of its divisors is an integer number (17251650).

Almost surely, 2^68239771 is an apocalyptic number.

68239771 is a deficient number, since it is larger than the sum of its proper divisors (766829).

68239771 is an equidigital number, since it uses as much as digits as its factorization.

68239771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766828.

The product of its digits is 127008, while the sum is 43.

The square root of 68239771 is about 8260.7367104878. The cubic root of 68239771 is about 408.6446839684.

The spelling of 68239771 in words is "sixty-eight million, two hundred thirty-nine thousand, seven hundred seventy-one".