149879243 has 2 divisors, whose sum is σ = 149879244. Its totient is φ = 149879242.

The previous prime is 149879227. The next prime is 149879291. The reversal of 149879243 is 342978941.

It is a weak prime.

It is an emirp because it is prime and its reverse (342978941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149879243 - 2⁴ = 149879227 is a prime.

It is not a weakly prime, because it can be changed into another prime (149879143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74939621 + 74939622.

It is an arithmetic number, because the mean of its divisors is an integer number (74939622).

Almost surely, 2^149879243 is an apocalyptic number.

149879243 is a deficient number, since it is larger than the sum of its proper divisors (1).

149879243 is an equidigital number, since it uses as much as digits as its factorization.

149879243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 149879243 is about 12242.5178374385. The cubic root of 149879243 is about 531.1866646894.

The spelling of 149879243 in words is "one hundred forty-nine million, eight hundred seventy-nine thousand, two hundred forty-three".