67221197 has 2 divisors, whose sum is σ = 67221198. Its totient is φ = 67221196.

The previous prime is 67221191. The next prime is 67221211. The reversal of 67221197 is 79112276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49294441 + 17926756 = 7021^2 + 4234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67221197 is a prime.

It is a super-2 number, since 2×67221197² = 9037378652225618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67221191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33610598 + 33610599.

It is an arithmetic number, because the mean of its divisors is an integer number (33610599).

Almost surely, 2^67221197 is an apocalyptic number.

It is an amenable number.

67221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

67221197 is an equidigital number, since it uses as much as digits as its factorization.

67221197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 35.

The square root of 67221197 is about 8198.8533954450. The cubic root of 67221197 is about 406.6012853622.

The spelling of 67221197 in words is "sixty-seven million, two hundred twenty-one thousand, one hundred ninety-seven".