149772161 has 8 divisors (see below), whose sum is σ = 186729024. Its totient is φ = 116705520.

The previous prime is 149772151. The next prime is 149772209. The reversal of 149772161 is 161277941.

149772161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 149772161 - 2⁶ = 149772097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149772151) 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, 972470 + ... + 972623.

It is an arithmetic number, because the mean of its divisors is an integer number (23341128).

Almost surely, 2^149772161 is an apocalyptic number.

149772161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

149772161 is a deficient number, since it is larger than the sum of its proper divisors (36956863).

149772161 is a wasteful number, since it uses less digits than its factorization.

149772161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945111.

The product of its digits is 21168, while the sum is 38.

The square root of 149772161 is about 12238.1436909361. The cubic root of 149772161 is about 531.0601315310.

The spelling of 149772161 in words is "one hundred forty-nine million, seven hundred seventy-two thousand, one hundred sixty-one".