149248139 has 2 divisors, whose sum is σ = 149248140. Its totient is φ = 149248138.

The previous prime is 149248129. The next prime is 149248157. The reversal of 149248139 is 931842941.

It is a weak prime.

It is an emirp because it is prime and its reverse (931842941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149248139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149248096 and 149248105.

It is not a weakly prime, because it can be changed into another prime (149248129) 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, 74624069 + 74624070.

It is an arithmetic number, because the mean of its divisors is an integer number (74624070).

Almost surely, 2^149248139 is an apocalyptic number.

149248139 is a deficient number, since it is larger than the sum of its proper divisors (1).

149248139 is an equidigital number, since it uses as much as digits as its factorization.

149248139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 149248139 is about 12216.7155569736. The cubic root of 149248139 is about 530.4400510494.

The spelling of 149248139 in words is "one hundred forty-nine million, two hundred forty-eight thousand, one hundred thirty-nine".