149020139 has 2 divisors, whose sum is σ = 149020140. Its totient is φ = 149020138.

The previous prime is 149020121. The next prime is 149020163. The reversal of 149020139 is 931020941.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149020139 - 2²⁴ = 132242923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149020169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74510069 + 74510070.

It is an arithmetic number, because the mean of its divisors is an integer number (74510070).

Almost surely, 2^149020139 is an apocalyptic number.

149020139 is a deficient number, since it is larger than the sum of its proper divisors (1).

149020139 is an equidigital number, since it uses as much as digits as its factorization.

149020139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 149020139 is about 12207.3805134435. The cubic root of 149020139 is about 530.1698031926.

The spelling of 149020139 in words is "one hundred forty-nine million, twenty thousand, one hundred thirty-nine".