149899 has 2 divisors, whose sum is σ = 149900. Its totient is φ = 149898.

The previous prime is 149893. The next prime is 149909. The reversal of 149899 is 998941.

It is a weak prime.

It is an emirp because it is prime and its reverse (998941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149899 - 2⁵ = 149867 is a prime.

149899 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (149893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74949 + 74950.

It is an arithmetic number, because the mean of its divisors is an integer number (74950).

2¹⁴⁹⁸⁹⁹ is an apocalyptic number.

149899 is a deficient number, since it is larger than the sum of its proper divisors (1).

149899 is an equidigital number, since it uses as much as digits as its factorization.

149899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 40.

The square root of 149899 is about 387.1679222250. The cubic root of 149899 is about 53.1210003909.

The spelling of 149899 in words is "one hundred forty-nine thousand, eight hundred ninety-nine".