242646197 has 2 divisors, whose sum is σ = 242646198. Its totient is φ = 242646196.

The previous prime is 242646193. The next prime is 242646211. The reversal of 242646197 is 791646242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242549476 + 96721 = 15574^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 242646197 - 2² = 242646193 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242646193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121323098 + 121323099.

It is an arithmetic number, because the mean of its divisors is an integer number (121323099).

Almost surely, 2^242646197 is an apocalyptic number.

It is an amenable number.

242646197 is a deficient number, since it is larger than the sum of its proper divisors (1).

242646197 is an equidigital number, since it uses as much as digits as its factorization.

242646197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 242646197 is about 15577.1048978942. The cubic root of 242646197 is about 623.7221438879.

The spelling of 242646197 in words is "two hundred forty-two million, six hundred forty-six thousand, one hundred ninety-seven".