149869 has 4 divisors (see below), whose sum is σ = 151996. Its totient is φ = 147744.

The previous prime is 149867. The next prime is 149873. The reversal of 149869 is 968941.

149869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 968941 = 359 ⋅2699.

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 68644 = 285^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 149869 - 2¹ = 149867 is a prime.

It is a super-2 number, since 2×149869² = 44921434322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149861) 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, 954 + ... + 1099.

It is an arithmetic number, because the mean of its divisors is an integer number (37999).

2¹⁴⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

149869 is a deficient number, since it is larger than the sum of its proper divisors (2127).

149869 is an equidigital number, since it uses as much as digits as its factorization.

149869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126.

The product of its digits is 15552, while the sum is 37.

The square root of 149869 is about 387.1291774072. The cubic root of 149869 is about 53.1174563683.

The spelling of 149869 in words is "one hundred forty-nine thousand, eight hundred sixty-nine".