61217197 has 2 divisors, whose sum is σ = 61217198. Its totient is φ = 61217196.

The previous prime is 61217147. The next prime is 61217213. The reversal of 61217197 is 79171216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30680521 + 30536676 = 5539^2 + 5526^2 .

It is a cyclic number.

It is not a de Polignac number, because 61217197 - 2¹¹ = 61215149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61217147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30608598 + 30608599.

It is an arithmetic number, because the mean of its divisors is an integer number (30608599).

Almost surely, 2^61217197 is an apocalyptic number.

It is an amenable number.

61217197 is a deficient number, since it is larger than the sum of its proper divisors (1).

61217197 is an equidigital number, since it uses as much as digits as its factorization.

61217197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 34.

The square root of 61217197 is about 7824.1419337842. The cubic root of 61217197 is about 394.1163754763.

The spelling of 61217197 in words is "sixty-one million, two hundred seventeen thousand, one hundred ninety-seven".