149644573 has 8 divisors (see below), whose sum is σ = 161395416. Its totient is φ = 137928000.

The previous prime is 149644487. The next prime is 149644603. The reversal of 149644573 is 375446941.

It can be written as a sum of positive squares in 4 ways, for example, as 487204 + 149157369 = 698^2 + 12213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149644573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149641573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (20174427).

Almost surely, 2^149644573 is an apocalyptic number.

149644573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

149644573 is a deficient number, since it is larger than the sum of its proper divisors (11750843).

149644573 is a wasteful number, since it uses less digits than its factorization.

149644573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17135.

The product of its digits is 362880, while the sum is 43.

The square root of 149644573 is about 12232.9298616480. The cubic root of 149644573 is about 530.9092887464.

The spelling of 149644573 in words is "one hundred forty-nine million, six hundred forty-four thousand, five hundred seventy-three".