1427681873 has 4 divisors (see below), whose sum is σ = 1429646400. Its totient is φ = 1425717348.

The previous prime is 1427681837. The next prime is 1427681911. The reversal of 1427681873 is 3781867241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3781867241 = 383 ⋅9874327.

It is a cyclic number.

It is not a de Polignac number, because 1427681873 - 2⁶ = 1427681809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427681813) 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 in 3 ways as a sum of consecutive naturals, for example, 981173 + ... + 982626.

It is an arithmetic number, because the mean of its divisors is an integer number (357411600).

Almost surely, 2^1427681873 is an apocalyptic number.

It is an amenable number.

1427681873 is a deficient number, since it is larger than the sum of its proper divisors (1964527).

1427681873 is an equidigital number, since it uses as much as digits as its factorization.

1427681873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964526.

The product of its digits is 451584, while the sum is 47.

The square root of 1427681873 is about 37784.6777543491. The cubic root of 1427681873 is about 1126.0140645541.

The spelling of 1427681873 in words is "one billion, four hundred twenty-seven million, six hundred eighty-one thousand, eight hundred seventy-three".