149667839 has 4 divisors (see below), whose sum is σ = 149887656. Its totient is φ = 149448024.

The previous prime is 149667827. The next prime is 149667851. The reversal of 149667839 is 938766941.

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

It is an interprime number because it is at equal distance from previous prime (149667827) and next prime (149667851).

It is a cyclic number.

It is not a de Polignac number, because 149667839 - 2⁴ = 149667823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149667899) 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, 108884 + ... + 110249.

It is an arithmetic number, because the mean of its divisors is an integer number (37471914).

Almost surely, 2^149667839 is an apocalyptic number.

149667839 is a deficient number, since it is larger than the sum of its proper divisors (219817).

149667839 is an equidigital number, since it uses as much as digits as its factorization.

149667839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219816.

The product of its digits is 1959552, while the sum is 53.

The square root of 149667839 is about 12233.8807824827. The cubic root of 149667839 is about 530.9368017063.

The spelling of 149667839 in words is "one hundred forty-nine million, six hundred sixty-seven thousand, eight hundred thirty-nine".