1210400197 has 2 divisors, whose sum is σ = 1210400198. Its totient is φ = 1210400196.

The previous prime is 1210400183. The next prime is 1210400207. The reversal of 1210400197 is 7910040121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 865889476 + 344510721 = 29426^2 + 18561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210400197 - 2²⁷ = 1076182469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210400117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605200098 + 605200099.

It is an arithmetic number, because the mean of its divisors is an integer number (605200099).

Almost surely, 2^1210400197 is an apocalyptic number.

It is an amenable number.

1210400197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210400197 is an equidigital number, since it uses as much as digits as its factorization.

1210400197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1210400197 is about 34790.8062137111. The cubic root of 1210400197 is about 1065.7197033815.

The spelling of 1210400197 in words is "one billion, two hundred ten million, four hundred thousand, one hundred ninety-seven".