67400197 has 2 divisors, whose sum is σ = 67400198. Its totient is φ = 67400196.

The previous prime is 67400183. The next prime is 67400219. The reversal of 67400197 is 79100476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61952641 + 5447556 = 7871^2 + 2334^2 .

It is a cyclic number.

It is not a de Polignac number, because 67400197 - 2¹⁵ = 67367429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67400117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33700098 + 33700099.

It is an arithmetic number, because the mean of its divisors is an integer number (33700099).

Almost surely, 2^67400197 is an apocalyptic number.

It is an amenable number.

67400197 is a deficient number, since it is larger than the sum of its proper divisors (1).

67400197 is an equidigital number, since it uses as much as digits as its factorization.

67400197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 67400197 is about 8209.7622986296. The cubic root of 67400197 is about 406.9618716382.

The spelling of 67400197 in words is "sixty-seven million, four hundred thousand, one hundred ninety-seven".