149858917 has 8 divisors (see below), whose sum is σ = 165748856. Its totient is φ = 134592192.

The previous prime is 149858911. The next prime is 149858941. The reversal of 149858917 is 719858941.

It can be written as a sum of positive squares in 4 ways, for example, as 2819041 + 147039876 = 1679^2 + 12126^2 .

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 149858917 - 2⁷ = 149858789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149858911) 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, 155298 + ... + 156259.

It is an arithmetic number, because the mean of its divisors is an integer number (20718607).

Almost surely, 2^149858917 is an apocalyptic number.

It is an amenable number.

149858917 is a deficient number, since it is larger than the sum of its proper divisors (15889939).

149858917 is a wasteful number, since it uses less digits than its factorization.

149858917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311607.

The product of its digits is 725760, while the sum is 52.

The square root of 149858917 is about 12241.6876695985. The cubic root of 149858917 is about 531.1626511613.

The spelling of 149858917 in words is "one hundred forty-nine million, eight hundred fifty-eight thousand, nine hundred seventeen".