149071243 has 2 divisors, whose sum is σ = 149071244. Its totient is φ = 149071242.

The previous prime is 149071217. The next prime is 149071267. The reversal of 149071243 is 342170941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149071243 - 2¹⁷ = 148940171 is a prime.

It is not a weakly prime, because it can be changed into another prime (149071543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74535621 + 74535622.

It is an arithmetic number, because the mean of its divisors is an integer number (74535622).

Almost surely, 2^149071243 is an apocalyptic number.

149071243 is a deficient number, since it is larger than the sum of its proper divisors (1).

149071243 is an equidigital number, since it uses as much as digits as its factorization.

149071243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 149071243 is about 12209.4734939718. The cubic root of 149071243 is about 530.2304005975.

The spelling of 149071243 in words is "one hundred forty-nine million, seventy-one thousand, two hundred forty-three".