149780513 has 4 divisors (see below), whose sum is σ = 151324740. Its totient is φ = 148236288.

The previous prime is 149780509. The next prime is 149780573. The reversal of 149780513 is 315087941.

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

It can be written as a sum of positive squares in 2 ways, for example, as 102556129 + 47224384 = 10127^2 + 6872^2 .

It is a cyclic number.

It is not a de Polignac number, because 149780513 - 2² = 149780509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149780573) 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, 771968 + ... + 772161.

It is an arithmetic number, because the mean of its divisors is an integer number (37831185).

Almost surely, 2^149780513 is an apocalyptic number.

It is an amenable number.

149780513 is a deficient number, since it is larger than the sum of its proper divisors (1544227).

149780513 is an equidigital number, since it uses as much as digits as its factorization.

149780513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544226.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 149780513 is about 12238.4849144001. The cubic root of 149780513 is about 531.0700028176.

The spelling of 149780513 in words is "one hundred forty-nine million, seven hundred eighty thousand, five hundred thirteen".