307438133 has 4 divisors (see below), whose sum is σ = 307767180. Its totient is φ = 307109088.

The previous prime is 307438099. The next prime is 307438169. The reversal of 307438133 is 331834703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331834703 = 59 ⋅5624317.

It can be written as a sum of positive squares in 2 ways, for example, as 97970404 + 209467729 = 9898^2 + 14473^2 .

It is a cyclic number.

It is not a de Polignac number, because 307438133 - 2¹⁸ = 307175989 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 307438133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307738133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163118 + ... + 164991.

It is an arithmetic number, because the mean of its divisors is an integer number (76941795).

Almost surely, 2^307438133 is an apocalyptic number.

It is an amenable number.

307438133 is a deficient number, since it is larger than the sum of its proper divisors (329047).

307438133 is an equidigital number, since it uses as much as digits as its factorization.

307438133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329046.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 307438133 is about 17533.9137958415. The cubic root of 307438133 is about 674.9204354321.

The spelling of 307438133 in words is "three hundred seven million, four hundred thirty-eight thousand, one hundred thirty-three".