154198273897 has 2 divisors, whose sum is σ = 154198273898. Its totient is φ = 154198273896.

The previous prime is 154198273811. The next prime is 154198273903. The reversal of 154198273897 is 798372891451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153994241241 + 204032656 = 392421^2 + 14284^2 .

It is a cyclic number.

It is not a de Polignac number, because 154198273897 - 2¹¹ = 154198271849 is a prime.

It is not a weakly prime, because it can be changed into another prime (154198273807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77099136948 + 77099136949.

It is an arithmetic number, because the mean of its divisors is an integer number (77099136949).

Almost surely, 2^154198273897 is an apocalyptic number.

It is an amenable number.

154198273897 is a deficient number, since it is larger than the sum of its proper divisors (1).

154198273897 is an equidigital number, since it uses as much as digits as its factorization.

154198273897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 64.

The spelling of 154198273897 in words is "one hundred fifty-four billion, one hundred ninety-eight million, two hundred seventy-three thousand, eight hundred ninety-seven".