149117217 has 16 divisors (see below), whose sum is σ = 217779840. Its totient is φ = 90336512.

The previous prime is 149117209. The next prime is 149117231. The reversal of 149117217 is 712711941.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 149117217 - 2³ = 149117209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149117207) 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, 48933 + ... + 51890.

It is an arithmetic number, because the mean of its divisors is an integer number (13611240).

Almost surely, 2^149117217 is an apocalyptic number.

149117217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

149117217 is a deficient number, since it is larger than the sum of its proper divisors (68662623).

149117217 is a wasteful number, since it uses less digits than its factorization.

149117217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100872.

The product of its digits is 3528, while the sum is 33.

The square root of 149117217 is about 12211.3560672024. The cubic root of 149117217 is about 530.2849031884.

The spelling of 149117217 in words is "one hundred forty-nine million, one hundred seventeen thousand, two hundred seventeen".