149770181 has 32 divisors (see below), whose sum is σ = 178848000. Its totient is φ = 123988480.

The previous prime is 149770163. The next prime is 149770183. The reversal of 149770181 is 181077941.

It is a happy number.

It is not a de Polignac number, because 149770181 - 2¹⁰ = 149769157 is a prime.

It is a super-3 number, since 3×149770181³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149770183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1005095 + ... + 1005243.

It is an arithmetic number, because the mean of its divisors is an integer number (5589000).

Almost surely, 2^149770181 is an apocalyptic number.

149770181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

149770181 is a deficient number, since it is larger than the sum of its proper divisors (29077819).

149770181 is a wasteful number, since it uses less digits than its factorization.

149770181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 149770181 is about 12238.0627960474. The cubic root of 149770181 is about 531.0577913015.

The spelling of 149770181 in words is "one hundred forty-nine million, seven hundred seventy thousand, one hundred eighty-one".