149297839 has 4 divisors (see below), whose sum is σ = 157155640. Its totient is φ = 141440040.

The previous prime is 149297821. The next prime is 149297843. The reversal of 149297839 is 938792941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938792941 = 10099 ⋅92959.

It is a cyclic number.

It is not a de Polignac number, because 149297839 - 2⁷ = 149297711 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 (149297039) 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, 3928872 + ... + 3928909.

It is an arithmetic number, because the mean of its divisors is an integer number (39288910).

Almost surely, 2^149297839 is an apocalyptic number.

149297839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

149297839 is a deficient number, since it is larger than the sum of its proper divisors (7857801).

149297839 is an equidigital number, since it uses as much as digits as its factorization.

149297839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7857800.

The product of its digits is 979776, while the sum is 52.

The square root of 149297839 is about 12218.7494859335. The cubic root of 149297839 is about 530.4989237987.

The spelling of 149297839 in words is "one hundred forty-nine million, two hundred ninety-seven thousand, eight hundred thirty-nine".