149869985 has 8 divisors (see below), whose sum is σ = 182792616. Its totient is φ = 117930240.

The previous prime is 149869963. The next prime is 149869987. The reversal of 149869985 is 589968941.

149869985 = 8656² + 8657².

It can be written as a sum of positive squares in 4 ways, for example, as 2999824 + 146870161 = 1732^2 + 12119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149869985 - 2⁸ = 149869729 is a prime.

It is a super-2 number, since 2×149869985² = 44922024807800450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149869987) 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, 245384 + ... + 245993.

It is an arithmetic number, because the mean of its divisors is an integer number (22849077).

Almost surely, 2^149869985 is an apocalyptic number.

149869985 is the 8657-th centered square number.

It is an amenable number.

149869985 is a deficient number, since it is larger than the sum of its proper divisors (32922631).

149869985 is an equidigital number, since it uses as much as digits as its factorization.

149869985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491443.

The product of its digits is 5598720, while the sum is 59.

The square root of 149869985 is about 12242.1397231040. The cubic root of 149869985 is about 531.1757273790.

The spelling of 149869985 in words is "one hundred forty-nine million, eight hundred sixty-nine thousand, nine hundred eighty-five".