149865139 has 4 divisors (see below), whose sum is σ = 149911560. Its totient is φ = 149818720.

The previous prime is 149865101. The next prime is 149865151. The reversal of 149865139 is 931568941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149865139 - 2¹³ = 149856947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149865239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17974 + ... + 24955.

It is an arithmetic number, because the mean of its divisors is an integer number (37477890).

Almost surely, 2^149865139 is an apocalyptic number.

149865139 is a deficient number, since it is larger than the sum of its proper divisors (46421).

149865139 is an equidigital number, since it uses as much as digits as its factorization.

149865139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46420.

The product of its digits is 233280, while the sum is 46.

The square root of 149865139 is about 12241.9417985873. The cubic root of 149865139 is about 531.1700021826.

The spelling of 149865139 in words is "one hundred forty-nine million, eight hundred sixty-five thousand, one hundred thirty-nine".