149523985 has 16 divisors (see below), whose sum is σ = 194228496. Its totient is φ = 109847808.

The previous prime is 149523961. The next prime is 149523991. The reversal of 149523985 is 589325941.

It is a Cunningham number, because it is equal to 12228²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 9314704 + 140209281 = 3052^2 + 11841^2 .

It is a cyclic number.

It is not a de Polignac number, because 149523985 - 2²⁷ = 15306257 is a prime.

It is a Duffinian number.

149523985 is a modest number, since divided by 23985 gives 1495 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6967 + ... + 18643.

It is an arithmetic number, because the mean of its divisors is an integer number (12139281).

Almost surely, 2^149523985 is an apocalyptic number.

It is an amenable number.

149523985 is a deficient number, since it is larger than the sum of its proper divisors (44704511).

149523985 is a wasteful number, since it uses less digits than its factorization.

149523985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892.

The product of its digits is 388800, while the sum is 46.

The square root of 149523985 is about 12228.0000408898. Note that the first 4 decimals coincide. The cubic root of 149523985 is about 530.7666429815.

The spelling of 149523985 in words is "one hundred forty-nine million, five hundred twenty-three thousand, nine hundred eighty-five".