1806601946 has 4 divisors (see below), whose sum is σ = 2709902922. Its totient is φ = 903300972.

The previous prime is 1806601943. The next prime is 1806601949. The reversal of 1806601946 is 6491066081.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1806601943) and next prime (1806601949).

It can be written as a sum of positive squares in only one way, i.e., 1028805625 + 777796321 = 32075^2 + 27889^2 .

It is not an unprimeable number, because it can be changed into a prime (1806601943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451650485 + ... + 451650488.

Almost surely, 2^1806601946 is an apocalyptic number.

1806601946 is a deficient number, since it is larger than the sum of its proper divisors (903300976).

1806601946 is an equidigital number, since it uses as much as digits as its factorization.

1806601946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903300975.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1806601946 is about 42504.1403395010. The cubic root of 1806601946 is about 1217.9257834440.

The spelling of 1806601946 in words is "one billion, eight hundred six million, six hundred one thousand, nine hundred forty-six".