149945191 has 8 divisors (see below), whose sum is σ = 163849104. Its totient is φ = 136086720.

The previous prime is 149945179. The next prime is 149945197. The reversal of 149945191 is 191549941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149945191 - 2⁷ = 149945063 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 (149945197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4260 + ... + 17833.

It is an arithmetic number, because the mean of its divisors is an integer number (20481138).

Almost surely, 2^149945191 is an apocalyptic number.

149945191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

149945191 is a deficient number, since it is larger than the sum of its proper divisors (13903913).

149945191 is a wasteful number, since it uses less digits than its factorization.

149945191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22721.

The product of its digits is 58320, while the sum is 43.

The square root of 149945191 is about 12245.2109414252. The cubic root of 149945191 is about 531.2645619815.

The spelling of 149945191 in words is "one hundred forty-nine million, nine hundred forty-five thousand, one hundred ninety-one".