150409999 has 4 divisors (see below), whose sum is σ = 159257664. Its totient is φ = 141562336.

The previous prime is 150409997. The next prime is 150410059. The reversal of 150409999 is 999904051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999904051 = 19 ⋅52626529.

It is a cyclic number.

It is not a de Polignac number, because 150409999 - 2¹ = 150409997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150409997) 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, 4423807 + ... + 4423840.

It is an arithmetic number, because the mean of its divisors is an integer number (39814416).

Almost surely, 2^150409999 is an apocalyptic number.

150409999 is a deficient number, since it is larger than the sum of its proper divisors (8847665).

150409999 is an equidigital number, since it uses as much as digits as its factorization.

150409999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8847664.

The product of its (nonzero) digits is 131220, while the sum is 46.

The square root of 150409999 is about 12264.1754309044. The cubic root of 150409999 is about 531.8129430272.

It can be divided in two parts, 1 and 50409999, that added together give a square (50410000 = 7100²).

The spelling of 150409999 in words is "one hundred fifty million, four hundred nine thousand, nine hundred ninety-nine".