149019169 has 4 divisors (see below), whose sum is σ = 160482196. Its totient is φ = 137556144.

The previous prime is 149019097. The next prime is 149019173. The reversal of 149019169 is 961910941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 961910941 = 37 ⋅25997593.

It can be written as a sum of positive squares in 2 ways, for example, as 14922769 + 134096400 = 3863^2 + 11580^2 .

It is a cyclic number.

It is not a de Polignac number, because 149019169 - 2²⁵ = 115464737 is a prime.

It is a super-3 number, since 3×149019169³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149019769) 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, 5731494 + ... + 5731519.

It is an arithmetic number, because the mean of its divisors is an integer number (40120549).

Almost surely, 2^149019169 is an apocalyptic number.

It is an amenable number.

149019169 is a deficient number, since it is larger than the sum of its proper divisors (11463027).

149019169 is a wasteful number, since it uses less digits than its factorization.

149019169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11463026.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 149019169 is about 12207.3407833156. The cubic root of 149019169 is about 530.1686528653.

The spelling of 149019169 in words is "one hundred forty-nine million, nineteen thousand, one hundred sixty-nine".