149974291 has 4 divisors (see below), whose sum is σ = 149998792. Its totient is φ = 149949792.

The previous prime is 149974273. The next prime is 149974337. The reversal of 149974291 is 192479941.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 149974291 - 2¹⁵ = 149941523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149974211) 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, 5680 + ... + 18226.

It is an arithmetic number, because the mean of its divisors is an integer number (37499698).

Almost surely, 2^149974291 is an apocalyptic number.

149974291 is a deficient number, since it is larger than the sum of its proper divisors (24501).

149974291 is a wasteful number, since it uses less digits than its factorization.

149974291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24500.

The product of its digits is 163296, while the sum is 46.

The square root of 149974291 is about 12246.3991034099. The cubic root of 149974291 is about 531.2989274245.

The spelling of 149974291 in words is "one hundred forty-nine million, nine hundred seventy-four thousand, two hundred ninety-one".