149781223 has 2 divisors, whose sum is σ = 149781224. Its totient is φ = 149781222.

The previous prime is 149781209. The next prime is 149781227. The reversal of 149781223 is 322187941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149781223 - 2¹³ = 149773031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149781227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74890611 + 74890612.

It is an arithmetic number, because the mean of its divisors is an integer number (74890612).

Almost surely, 2^149781223 is an apocalyptic number.

149781223 is a deficient number, since it is larger than the sum of its proper divisors (1).

149781223 is an equidigital number, since it uses as much as digits as its factorization.

149781223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 149781223 is about 12238.5139212243. The cubic root of 149781223 is about 531.0708419546.

The spelling of 149781223 in words is "one hundred forty-nine million, seven hundred eighty-one thousand, two hundred twenty-three".