149799 has 16 divisors (see below), whose sum is σ = 225792. Its totient is φ = 87648.

The previous prime is 149791. The next prime is 149803. The reversal of 149799 is 997941.

149799 = 33² + 34² + ... + 78².

It is not a de Polignac number, because 149799 - 2³ = 149791 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

149799 is a lucky number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814 + ... + 980.

It is an arithmetic number, because the mean of its divisors is an integer number (14112).

2¹⁴⁹⁷⁹⁹ is an apocalyptic number.

149799 is a deficient number, since it is larger than the sum of its proper divisors (75993).

149799 is a wasteful number, since it uses less digits than its factorization.

149799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206.

The product of its digits is 20412, while the sum is 39.

The square root of 149799 is about 387.0387577491. The cubic root of 149799 is about 53.1091851426.

It can be divided in two parts, 1497 and 99, that added together give a triangular number (1596 = T₅₆).

The spelling of 149799 in words is "one hundred forty-nine thousand, seven hundred ninety-nine".