149091843 has 4 divisors (see below), whose sum is σ = 198789128. Its totient is φ = 99394560.

The previous prime is 149091829. The next prime is 149091851. The reversal of 149091843 is 348190941.

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

It is not a de Polignac number, because 149091843 - 2⁴ = 149091827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149091823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24848638 + ... + 24848643.

It is an arithmetic number, because the mean of its divisors is an integer number (49697282).

Almost surely, 2^149091843 is an apocalyptic number.

149091843 is a deficient number, since it is larger than the sum of its proper divisors (49697285).

149091843 is an equidigital number, since it uses as much as digits as its factorization.

149091843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49697284.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 149091843 is about 12210.3170720502. The cubic root of 149091843 is about 530.2548234684.

The spelling of 149091843 in words is "one hundred forty-nine million, ninety-one thousand, eight hundred forty-three".