149823812 has 6 divisors (see below), whose sum is σ = 262191678. Its totient is φ = 74911904.

The previous prime is 149823811. The next prime is 149823823. The reversal of 149823812 is 218328941.

It can be written as a sum of positive squares in only one way, i.e., 83466496 + 66357316 = 9136^2 + 8146^2 .

It is a super-2 number, since 2×149823812² = 44894349284422688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149823811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18727973 + ... + 18727980.

It is an arithmetic number, because the mean of its divisors is an integer number (43698613).

Almost surely, 2^149823812 is an apocalyptic number.

It is an amenable number.

149823812 is a deficient number, since it is larger than the sum of its proper divisors (112367866).

149823812 is a wasteful number, since it uses less digits than its factorization.

149823812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37455957 (or 37455955 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 149823812 is about 12240.2537555395. The cubic root of 149823812 is about 531.1211723236.

The spelling of 149823812 in words is "one hundred forty-nine million, eight hundred twenty-three thousand, eight hundred twelve".