149857199 has 4 divisors (see below), whose sum is σ = 157744440. Its totient is φ = 141969960.

The previous prime is 149857187. The next prime is 149857207. The reversal of 149857199 is 991758941.

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

It is a cyclic number.

It is not a de Polignac number, because 149857199 - 2⁸ = 149856943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149857199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149857139) 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, 3943592 + ... + 3943629.

It is an arithmetic number, because the mean of its divisors is an integer number (39436110).

Almost surely, 2^149857199 is an apocalyptic number.

149857199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

149857199 is a deficient number, since it is larger than the sum of its proper divisors (7887241).

149857199 is an equidigital number, since it uses as much as digits as its factorization.

149857199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887240.

The product of its digits is 816480, while the sum is 53.

The square root of 149857199 is about 12241.6174993340. The cubic root of 149857199 is about 531.1606213834.

The spelling of 149857199 in words is "one hundred forty-nine million, eight hundred fifty-seven thousand, one hundred ninety-nine".