2421842197 has 2 divisors, whose sum is σ = 2421842198. Its totient is φ = 2421842196.

The previous prime is 2421842153. The next prime is 2421842221. The reversal of 2421842197 is 7912481242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1548107716 + 873734481 = 39346^2 + 29559^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421842197 - 2²³ = 2413453589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421842147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210921098 + 1210921099.

It is an arithmetic number, because the mean of its divisors is an integer number (1210921099).

Almost surely, 2^2421842197 is an apocalyptic number.

It is an amenable number.

2421842197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421842197 is an equidigital number, since it uses as much as digits as its factorization.

2421842197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 2421842197 is about 49212.2159326320. The cubic root of 2421842197 is about 1342.9152756587.

The spelling of 2421842197 in words is "two billion, four hundred twenty-one million, eight hundred forty-two thousand, one hundred ninety-seven".