149381243 has 4 divisors (see below), whose sum is σ = 162961368. Its totient is φ = 135801120.

The previous prime is 149381237. The next prime is 149381279. The reversal of 149381243 is 342183941.

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 149381243 - 2¹⁶ = 149315707 is a prime.

It is a super-3 number, since 3×149381243³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149381203) 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, 6790046 + ... + 6790067.

It is an arithmetic number, because the mean of its divisors is an integer number (40740342).

Almost surely, 2^149381243 is an apocalyptic number.

149381243 is a deficient number, since it is larger than the sum of its proper divisors (13580125).

149381243 is a wasteful number, since it uses less digits than its factorization.

149381243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13580124.

The product of its digits is 20736, while the sum is 35.

The square root of 149381243 is about 12222.1619609626. The cubic root of 149381243 is about 530.5976916842.

The spelling of 149381243 in words is "one hundred forty-nine million, three hundred eighty-one thousand, two hundred forty-three".