1421647829 has 6 divisors (see below), whose sum is σ = 1653753654. Its totient is φ = 1218555240.

The previous prime is 1421647823. The next prime is 1421647853. The reversal of 1421647829 is 9287461241.

It can be written as a sum of positive squares in only one way, i.e., 1421440804 + 207025 = 37702^2 + 455^2 .

It is not a de Polignac number, because 1421647829 - 2⁴ = 1421647813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1421647829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421647823) 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 in 5 ways as a sum of consecutive naturals, for example, 14506562 + ... + 14506659.

It is an arithmetic number, because the mean of its divisors is an integer number (275625609).

Almost surely, 2^1421647829 is an apocalyptic number.

It is an amenable number.

1421647829 is a deficient number, since it is larger than the sum of its proper divisors (232105825).

1421647829 is an equidigital number, since it uses as much as digits as its factorization.

1421647829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29013235 (or 29013228 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 1421647829 is about 37704.7454440419. The cubic root of 1421647829 is about 1124.4254723062.

The spelling of 1421647829 in words is "one billion, four hundred twenty-one million, six hundred forty-seven thousand, eight hundred twenty-nine".