149815373 has 4 divisors (see below), whose sum is σ = 158628060. Its totient is φ = 141002688.

The previous prime is 149815357. The next prime is 149815387. The reversal of 149815373 is 373518941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 373518941 = 43 ⋅8686487.

It can be written as a sum of positive squares in 2 ways, for example, as 122168809 + 27646564 = 11053^2 + 5258^2 .

It is a cyclic number.

It is not a de Polignac number, because 149815373 - 2⁴ = 149815357 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 149815373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149815313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4406318 + ... + 4406351.

It is an arithmetic number, because the mean of its divisors is an integer number (39657015).

Almost surely, 2^149815373 is an apocalyptic number.

It is an amenable number.

149815373 is a deficient number, since it is larger than the sum of its proper divisors (8812687).

149815373 is an equidigital number, since it uses as much as digits as its factorization.

149815373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8812686.

The product of its digits is 90720, while the sum is 41.

The square root of 149815373 is about 12239.9090274397. The cubic root of 149815373 is about 531.1112001310. Note that the first 3 decimals are identical.

The spelling of 149815373 in words is "one hundred forty-nine million, eight hundred fifteen thousand, three hundred seventy-three".