149997563 has 4 divisors (see below), whose sum is σ = 150895920. Its totient is φ = 149099208.

The previous prime is 149997527. The next prime is 149997569. The reversal of 149997563 is 365799941.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149997563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149997569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448928 + ... + 449261.

It is an arithmetic number, because the mean of its divisors is an integer number (37723980).

Almost surely, 2^149997563 is an apocalyptic number.

149997563 is a deficient number, since it is larger than the sum of its proper divisors (898357).

149997563 is an equidigital number, since it uses as much as digits as its factorization.

149997563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898356.

The product of its digits is 1837080, while the sum is 53.

The square root of 149997563 is about 12247.3492234034. The cubic root of 149997563 is about 531.3264071325.

The spelling of 149997563 in words is "one hundred forty-nine million, nine hundred ninety-seven thousand, five hundred sixty-three".