1427689669 has 8 divisors (see below), whose sum is σ = 1635173120. Its totient is φ = 1221088176.

The previous prime is 1427689661. The next prime is 1427689709. The reversal of 1427689669 is 9669867241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1427689669 - 2³ = 1427689661 is a prime.

It is a super-2 number, since 2×1427689669² = 4076595581938659122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427689661) 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 7 ways as a sum of consecutive naturals, for example, 217014 + ... + 223495.

It is an arithmetic number, because the mean of its divisors is an integer number (204396640).

Almost surely, 2^1427689669 is an apocalyptic number.

It is an amenable number.

1427689669 is a deficient number, since it is larger than the sum of its proper divisors (207483451).

1427689669 is an equidigital number, since it uses as much as digits as its factorization.

1427689669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440979.

The product of its digits is 7838208, while the sum is 58.

The square root of 1427689669 is about 37784.7809177187. The cubic root of 1427689669 is about 1126.0161141213.

The spelling of 1427689669 in words is "one billion, four hundred twenty-seven million, six hundred eighty-nine thousand, six hundred sixty-nine".