154999223 has 2 divisors, whose sum is σ = 154999224. Its totient is φ = 154999222.

The previous prime is 154999181. The next prime is 154999249. The reversal of 154999223 is 322999451.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154999223 - 2²⁶ = 87890359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154999723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77499611 + 77499612.

It is an arithmetic number, because the mean of its divisors is an integer number (77499612).

Almost surely, 2^154999223 is an apocalyptic number.

154999223 is a deficient number, since it is larger than the sum of its proper divisors (1).

154999223 is an equidigital number, since it uses as much as digits as its factorization.

154999223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 154999223 is about 12449.8683928787. The cubic root of 154999223 is about 537.1676379017.

The spelling of 154999223 in words is "one hundred fifty-four million, nine hundred ninety-nine thousand, two hundred twenty-three".