154198361 has 2 divisors, whose sum is σ = 154198362. Its totient is φ = 154198360.

The previous prime is 154198333. The next prime is 154198379. The reversal of 154198361 is 163891451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110901961 + 43296400 = 10531^2 + 6580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154198361 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (154198391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77099180 + 77099181.

It is an arithmetic number, because the mean of its divisors is an integer number (77099181).

Almost surely, 2^154198361 is an apocalyptic number.

It is an amenable number.

154198361 is a deficient number, since it is larger than the sum of its proper divisors (1).

154198361 is an equidigital number, since it uses as much as digits as its factorization.

154198361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 154198361 is about 12417.6632664926. The cubic root of 154198361 is about 536.2408801198.

The spelling of 154198361 in words is "one hundred fifty-four million, one hundred ninety-eight thousand, three hundred sixty-one".