149738969 has 4 divisors (see below), whose sum is σ = 150918144. Its totient is φ = 148559796.

The previous prime is 149738951. The next prime is 149738971. The reversal of 149738969 is 969837941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 969837941 = 23 ⋅42166867.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149738969 is a prime.

It is a super-3 number, since 3×149738969³ (a number of 26 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 (149738909) 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, 589397 + ... + 589650.

It is an arithmetic number, because the mean of its divisors is an integer number (37729536).

Almost surely, 2^149738969 is an apocalyptic number.

It is an amenable number.

149738969 is a deficient number, since it is larger than the sum of its proper divisors (1179175).

149738969 is a wasteful number, since it uses less digits than its factorization.

149738969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179174.

The product of its digits is 2939328, while the sum is 56.

The square root of 149738969 is about 12236.7875277787. The cubic root of 149738969 is about 531.0208980489.

The spelling of 149738969 in words is "one hundred forty-nine million, seven hundred thirty-eight thousand, nine hundred sixty-nine".