149166869 has 4 divisors (see below), whose sum is σ = 153198444. Its totient is φ = 145135296.

The previous prime is 149166863. The next prime is 149166887. The reversal of 149166869 is 968661941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103266244 + 45900625 = 10162^2 + 6775^2 .

It is a cyclic number.

It is not a de Polignac number, because 149166869 - 2¹⁶ = 149101333 is a prime.

It is a super-2 number, since 2×149166869² = 44501509614526322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149166863) 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, 2015732 + ... + 2015805.

It is an arithmetic number, because the mean of its divisors is an integer number (38299611).

Almost surely, 2^149166869 is an apocalyptic number.

It is an amenable number.

149166869 is a deficient number, since it is larger than the sum of its proper divisors (4031575).

149166869 is an equidigital number, since it uses as much as digits as its factorization.

149166869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031574.

The product of its digits is 559872, while the sum is 50.

The square root of 149166869 is about 12213.3889236362. The cubic root of 149166869 is about 530.3437535003.

The spelling of 149166869 in words is "one hundred forty-nine million, one hundred sixty-six thousand, eight hundred sixty-nine".