68903381 has 2 divisors, whose sum is σ = 68903382. Its totient is φ = 68903380.

The previous prime is 68903321. The next prime is 68903413. The reversal of 68903381 is 18330986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57138481 + 11764900 = 7559^2 + 3430^2 .

It is a cyclic number.

It is not a de Polignac number, because 68903381 - 2²² = 64709077 is a prime.

It is a super-2 number, since 2×68903381² = 9495351826462322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68903321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34451690 + 34451691.

It is an arithmetic number, because the mean of its divisors is an integer number (34451691).

Almost surely, 2^68903381 is an apocalyptic number.

It is an amenable number.

68903381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68903381 is an equidigital number, since it uses as much as digits as its factorization.

68903381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 68903381 is about 8300.8060451983. The cubic root of 68903381 is about 409.9650594852.

The spelling of 68903381 in words is "sixty-eight million, nine hundred three thousand, three hundred eighty-one".