149563987 has 4 divisors (see below), whose sum is σ = 150399720. Its totient is φ = 148728256.

The previous prime is 149563979. The next prime is 149564017. The reversal of 149563987 is 789365941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149563987 - 2³ = 149563979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149563907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417598 + ... + 417955.

It is an arithmetic number, because the mean of its divisors is an integer number (37599930).

Almost surely, 2^149563987 is an apocalyptic number.

149563987 is a deficient number, since it is larger than the sum of its proper divisors (835733).

149563987 is an equidigital number, since it uses as much as digits as its factorization.

149563987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835732.

The product of its digits is 1632960, while the sum is 52.

The square root of 149563987 is about 12229.6356037292. The cubic root of 149563987 is about 530.8139705817.

The spelling of 149563987 in words is "one hundred forty-nine million, five hundred sixty-three thousand, nine hundred eighty-seven".