149818869 has 8 divisors (see below), whose sum is σ = 221953920. Its totient is φ = 99879228.

The previous prime is 149818861. The next prime is 149818871. The reversal of 149818869 is 968818941.

It is not a de Polignac number, because 149818869 - 2³ = 149818861 is a prime.

It is a super-2 number, since 2×149818869² = 44891387016878322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149818861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2774397 + ... + 2774450.

It is an arithmetic number, because the mean of its divisors is an integer number (27744240).

Almost surely, 2^149818869 is an apocalyptic number.

It is an amenable number.

149818869 is a deficient number, since it is larger than the sum of its proper divisors (72135051).

149818869 is an equidigital number, since it uses as much as digits as its factorization.

149818869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5548856 (or 5548850 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 149818869 is about 12240.0518381255. The cubic root of 149818869 is about 531.1153313277.

The spelling of 149818869 in words is "one hundred forty-nine million, eight hundred eighteen thousand, eight hundred sixty-nine".