149740639 has 4 divisors (see below), whose sum is σ = 149786800. Its totient is φ = 149694480.

The previous prime is 149740627. The next prime is 149740667. The reversal of 149740639 is 936047941.

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 149740639 - 2⁹ = 149740127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149740595 and 149740604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149740609) 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 in 3 ways as a sum of consecutive naturals, for example, 17814 + ... + 24835.

It is an arithmetic number, because the mean of its divisors is an integer number (37446700).

Almost surely, 2^149740639 is an apocalyptic number.

149740639 is a deficient number, since it is larger than the sum of its proper divisors (46161).

149740639 is an equidigital number, since it uses as much as digits as its factorization.

149740639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46160.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 149740639 is about 12236.8557644519. The cubic root of 149740639 is about 531.0228721545.

The spelling of 149740639 in words is "one hundred forty-nine million, seven hundred forty thousand, six hundred thirty-nine".