191740149 has 16 divisors (see below), whose sum is σ = 290989440. Its totient is φ = 124708320.

The previous prime is 191740111. The next prime is 191740151. The reversal of 191740149 is 941047191.

It is not a de Polignac number, because 191740149 - 2¹⁵ = 191707381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191740169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85497 + ... + 87710.

It is an arithmetic number, because the mean of its divisors is an integer number (18186840).

Almost surely, 2^191740149 is an apocalyptic number.

It is an amenable number.

191740149 is a deficient number, since it is larger than the sum of its proper divisors (99249291).

191740149 is a wasteful number, since it uses less digits than its factorization.

191740149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173257 (or 173251 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 191740149 is about 13847.0267205635. The cubic root of 191740149 is about 576.6394536852.

The spelling of 191740149 in words is "one hundred ninety-one million, seven hundred forty thousand, one hundred forty-nine".