68879381 has 2 divisors, whose sum is σ = 68879382. Its totient is φ = 68879380.

The previous prime is 68879323. The next prime is 68879401. The reversal of 68879381 is 18397886.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38254225 + 30625156 = 6185^2 + 5534^2 .

It is a cyclic number.

It is not a de Polignac number, because 68879381 - 2²² = 64685077 is a prime.

It is a super-2 number, since 2×68879381² = 9488738253886322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68279381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34439690 + 34439691.

It is an arithmetic number, because the mean of its divisors is an integer number (34439691).

Almost surely, 2^68879381 is an apocalyptic number.

It is an amenable number.

68879381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68879381 is an equidigital number, since it uses as much as digits as its factorization.

68879381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 68879381 is about 8299.3602765514. The cubic root of 68879381 is about 409.9174551255.

The spelling of 68879381 in words is "sixty-eight million, eight hundred seventy-nine thousand, three hundred eighty-one".