149408917 has 4 divisors (see below), whose sum is σ = 170753056. Its totient is φ = 128064780.

The previous prime is 149408887. The next prime is 149408929. The reversal of 149408917 is 719804941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149408917 - 2²³ = 141020309 is a prime.

It is a super-2 number, since 2×149408917² = 44646048958225778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149408977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10672059 + ... + 10672072.

It is an arithmetic number, because the mean of its divisors is an integer number (42688264).

Almost surely, 2^149408917 is an apocalyptic number.

It is an amenable number.

149408917 is a deficient number, since it is larger than the sum of its proper divisors (21344139).

149408917 is an equidigital number, since it uses as much as digits as its factorization.

149408917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21344138.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 149408917 is about 12223.2940322975. The cubic root of 149408917 is about 530.6304554002.

The spelling of 149408917 in words is "one hundred forty-nine million, four hundred eight thousand, nine hundred seventeen".