154196243 has 2 divisors, whose sum is σ = 154196244. Its totient is φ = 154196242.

The previous prime is 154196197. The next prime is 154196269. The reversal of 154196243 is 342691451.

It is a strong prime.

It is an emirp because it is prime and its reverse (342691451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154196243 - 2⁶ = 154196179 is a prime.

It is not a weakly prime, because it can be changed into another prime (154196743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77098121 + 77098122.

It is an arithmetic number, because the mean of its divisors is an integer number (77098122).

Almost surely, 2^154196243 is an apocalyptic number.

154196243 is a deficient number, since it is larger than the sum of its proper divisors (1).

154196243 is an equidigital number, since it uses as much as digits as its factorization.

154196243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 154196243 is about 12417.5779844541. The cubic root of 154196243 is about 536.2384249199.

The spelling of 154196243 in words is "one hundred fifty-four million, one hundred ninety-six thousand, two hundred forty-three".