149805399 has 4 divisors (see below), whose sum is σ = 199740536. Its totient is φ = 99870264.

The previous prime is 149805391. The next prime is 149805413. The reversal of 149805399 is 993508941.

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

It is not a de Polignac number, because 149805399 - 2³ = 149805391 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 (149805391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24967564 + ... + 24967569.

It is an arithmetic number, because the mean of its divisors is an integer number (49935134).

Almost surely, 2^149805399 is an apocalyptic number.

149805399 is a deficient number, since it is larger than the sum of its proper divisors (49935137).

149805399 is an equidigital number, since it uses as much as digits as its factorization.

149805399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49935136.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 149805399 is about 12239.5015829894. The cubic root of 149805399 is about 531.0994135777.

The spelling of 149805399 in words is "one hundred forty-nine million, eight hundred five thousand, three hundred ninety-nine".