1850009449 has 2 divisors, whose sum is σ = 1850009450. Its totient is φ = 1850009448.

The previous prime is 1850009429. The next prime is 1850009459. The reversal of 1850009449 is 9449000581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 992691049 + 857318400 = 31507^2 + 29280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1850009449 - 2⁵ = 1850009417 is a prime.

It is a super-2 number, since 2×1850009449² = 6845069922778567202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1850009419) 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 as a sum of consecutive naturals, namely, 925004724 + 925004725.

It is an arithmetic number, because the mean of its divisors is an integer number (925004725).

Almost surely, 2^1850009449 is an apocalyptic number.

It is an amenable number.

1850009449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850009449 is an equidigital number, since it uses as much as digits as its factorization.

1850009449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1850009449 is about 43011.7361774667. The cubic root of 1850009449 is about 1227.6031162070.

The spelling of 1850009449 in words is "one billion, eight hundred fifty million, nine thousand, four hundred forty-nine".