1909614212197 has 2 divisors, whose sum is σ = 1909614212198. Its totient is φ = 1909614212196.

The previous prime is 1909614212179. The next prime is 1909614212203. The reversal of 1909614212197 is 7912124169091.

It is a happy number.

Together with previous prime (1909614212179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1150483631236 + 759130580961 = 1072606^2 + 871281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1909614212197 - 2²³ = 1909605823589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1909614312197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954807106098 + 954807106099.

It is an arithmetic number, because the mean of its divisors is an integer number (954807106099).

Almost surely, 2^{1909614212197} is an apocalyptic number.

It is an amenable number.

1909614212197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1909614212197 is an equidigital number, since it uses as much as digits as its factorization.

1909614212197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 52.

The spelling of 1909614212197 in words is "one trillion, nine hundred nine billion, six hundred fourteen million, two hundred twelve thousand, one hundred ninety-seven".