149573242009 has 3 divisors (see below), whose sum is σ = 149573628757. Its totient is φ = 149572855262.

The previous prime is 149573242003. The next prime is 149573242057. The reversal of 149573242009 is 900242375941.

The square root of 149573242009 is 386747.

It is a perfect power (a square), and thus also a powerful 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 is not a de Polignac number, because 149573242009 - 2⁵ = 149573241977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149573242009.

It is not an unprimeable number, because it can be changed into a prime (149573242003) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 193374 + ... + 580120.

Almost surely, 2^149573242009 is an apocalyptic number.

149573242009 is the 386747-th square number.

149573242009 is the 193374-th centered octagonal number.

It is an amenable number.

149573242009 is a deficient number, since it is larger than the sum of its proper divisors (386748).

149573242009 is an frugal number, since it uses more digits than its factorization.

149573242009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773494 (or 386747 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 149573242009 in words is "one hundred forty-nine billion, five hundred seventy-three million, two hundred forty-two thousand, nine".