67526981 has 2 divisors, whose sum is σ = 67526982. Its totient is φ = 67526980.

The previous prime is 67526957. The next prime is 67526983. The reversal of 67526981 is 18962576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40132225 + 27394756 = 6335^2 + 5234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67526981 is a prime.

It is a super-2 number, since 2×67526981² = 9119786325948722, which contains 22 as substring.

Together with 67526983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67526983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33763490 + 33763491.

It is an arithmetic number, because the mean of its divisors is an integer number (33763491).

Almost surely, 2^67526981 is an apocalyptic number.

It is an amenable number.

67526981 is a deficient number, since it is larger than the sum of its proper divisors (1).

67526981 is an equidigital number, since it uses as much as digits as its factorization.

67526981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 67526981 is about 8217.4802098940. The cubic root of 67526981 is about 407.2168854120.

The spelling of 67526981 in words is "sixty-seven million, five hundred twenty-six thousand, nine hundred eighty-one".