149471785 has 4 divisors (see below), whose sum is σ = 179366148. Its totient is φ = 119577424.

The previous prime is 149471783. The next prime is 149471813. The reversal of 149471785 is 587174941.

It is a happy number.

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 93760489 + 55711296 = 9683^2 + 7464^2 .

It is a cyclic number.

It is not a de Polignac number, because 149471785 - 2¹ = 149471783 is a prime.

It is a super-2 number, since 2×149471785² = 44683629022172450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149471783) 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 in 3 ways as a sum of consecutive naturals, for example, 14947174 + ... + 14947183.

It is an arithmetic number, because the mean of its divisors is an integer number (44841537).

Almost surely, 2^149471785 is an apocalyptic number.

It is an amenable number.

149471785 is a deficient number, since it is larger than the sum of its proper divisors (29894363).

149471785 is an equidigital number, since it uses as much as digits as its factorization.

149471785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29894362.

The product of its digits is 282240, while the sum is 46.

The square root of 149471785 is about 12225.8654090416. The cubic root of 149471785 is about 530.7048708550.

The spelling of 149471785 in words is "one hundred forty-nine million, four hundred seventy-one thousand, seven hundred eighty-five".