149815073 has 4 divisors (see below), whose sum is σ = 154981140. Its totient is φ = 144649008.

The previous prime is 149815063. The next prime is 149815097. The reversal of 149815073 is 370518941.

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 55472704 + 94342369 = 7448^2 + 9713^2 .

It is a cyclic number.

It is not a de Polignac number, because 149815073 - 2⁶ = 149815009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149815013) 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, 2582990 + ... + 2583047.

It is an arithmetic number, because the mean of its divisors is an integer number (38745285).

Almost surely, 2^149815073 is an apocalyptic number.

It is an amenable number.

149815073 is a deficient number, since it is larger than the sum of its proper divisors (5166067).

149815073 is an equidigital number, since it uses as much as digits as its factorization.

149815073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5166066.

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

The square root of 149815073 is about 12239.8967724405. The cubic root of 149815073 is about 531.1108456203.

The spelling of 149815073 in words is "one hundred forty-nine million, eight hundred fifteen thousand, seventy-three".