18750349 has 2 divisors, whose sum is σ = 18750350. Its totient is φ = 18750348.

The previous prime is 18750341. The next prime is 18750373. The reversal of 18750349 is 94305781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 6985449 = 3430^2 + 2643^2 .

It is a cyclic number.

It is not a de Polignac number, because 18750349 - 2³ = 18750341 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18750341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9375174 + 9375175.

It is an arithmetic number, because the mean of its divisors is an integer number (9375175).

Almost surely, 2^18750349 is an apocalyptic number.

It is an amenable number.

18750349 is a deficient number, since it is larger than the sum of its proper divisors (1).

18750349 is an equidigital number, since it uses as much as digits as its factorization.

18750349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 18750349 is about 4330.1673177835. The cubic root of 18750349 is about 265.6662905869. Note that the first 3 decimals are identical.

The spelling of 18750349 in words is "eighteen million, seven hundred fifty thousand, three hundred forty-nine".