149731513 has 4 divisors (see below), whose sum is σ = 149756020. Its totient is φ = 149707008.

The previous prime is 149731511. The next prime is 149731537. The reversal of 149731513 is 315137941.

149731513 = 8652² + 8653².

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 74874409 + 74857104 = 8653^2 + 8652^2 .

It is a cyclic number.

It is not a de Polignac number, because 149731513 - 2¹ = 149731511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149731511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5173 + ... + 18061.

It is an arithmetic number, because the mean of its divisors is an integer number (37439005).

Almost surely, 2^149731513 is an apocalyptic number.

149731513 is the 8653-rd centered square number.

It is an amenable number.

149731513 is a deficient number, since it is larger than the sum of its proper divisors (24507).

149731513 is a wasteful number, since it uses less digits than its factorization.

149731513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24506.

The product of its digits is 11340, while the sum is 34.

The square root of 149731513 is about 12236.4828688639. The cubic root of 149731513 is about 531.0120841386.

The spelling of 149731513 in words is "one hundred forty-nine million, seven hundred thirty-one thousand, five hundred thirteen".