67801381 has 2 divisors, whose sum is σ = 67801382. Its totient is φ = 67801380.

The previous prime is 67801373. The next prime is 67801397. The reversal of 67801381 is 18310876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66569281 + 1232100 = 8159^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 67801381 - 2³ = 67801373 is a prime.

It is a super-2 number, since 2×67801381² = 9194054531014322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67801361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33900690 + 33900691.

It is an arithmetic number, because the mean of its divisors is an integer number (33900691).

Almost surely, 2^67801381 is an apocalyptic number.

It is an amenable number.

67801381 is a deficient number, since it is larger than the sum of its proper divisors (1).

67801381 is an equidigital number, since it uses as much as digits as its factorization.

67801381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 67801381 is about 8234.1593985057. The cubic root of 67801381 is about 407.7677235014.

The spelling of 67801381 in words is "sixty-seven million, eight hundred one thousand, three hundred eighty-one".