149999405 has 4 divisors (see below), whose sum is σ = 179999292. Its totient is φ = 119999520.

The previous prime is 149999371. The next prime is 149999411. The reversal of 149999405 is 504999941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28536964 + 121462441 = 5342^2 + 11021^2 .

It is a de Polignac number, because none of the positive numbers 2^k-149999405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14999936 + ... + 14999945.

It is an arithmetic number, because the mean of its divisors is an integer number (44999823).

Almost surely, 2^149999405 is an apocalyptic number.

It is an amenable number.

149999405 is a deficient number, since it is larger than the sum of its proper divisors (29999887).

149999405 is an equidigital number, since it uses as much as digits as its factorization.

149999405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29999886.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 149999405 is about 12247.4244231185. The cubic root of 149999405 is about 531.3285820550.

The spelling of 149999405 in words is "one hundred forty-nine million, nine hundred ninety-nine thousand, four hundred five".