68742197 has 2 divisors, whose sum is σ = 68742198. Its totient is φ = 68742196.

The previous prime is 68742127. The next prime is 68742211. The reversal of 68742197 is 79124786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49434961 + 19307236 = 7031^2 + 4394^2 .

It is a cyclic number.

It is not a de Polignac number, because 68742197 - 2⁸ = 68741941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68742127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34371098 + 34371099.

It is an arithmetic number, because the mean of its divisors is an integer number (34371099).

Almost surely, 2^68742197 is an apocalyptic number.

It is an amenable number.

68742197 is a deficient number, since it is larger than the sum of its proper divisors (1).

68742197 is an equidigital number, since it uses as much as digits as its factorization.

68742197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 68742197 is about 8291.0914239321. The cubic root of 68742197 is about 409.6451361348.

The spelling of 68742197 in words is "sixty-eight million, seven hundred forty-two thousand, one hundred ninety-seven".