1798734621 has 4 divisors (see below), whose sum is σ = 2398312832. Its totient is φ = 1199156412.

The previous prime is 1798734611. The next prime is 1798734631. The reversal of 1798734621 is 1264378971.

It is a happy number.

1798734621 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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.

It is an interprime number because it is at equal distance from previous prime (1798734611) and next prime (1798734631).

It is not a de Polignac number, because 1798734621 - 2⁶ = 1798734557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798734611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299789101 + ... + 299789106.

It is an arithmetic number, because the mean of its divisors is an integer number (599578208).

Almost surely, 2^1798734621 is an apocalyptic number.

It is an amenable number.

1798734621 is a deficient number, since it is larger than the sum of its proper divisors (599578211).

1798734621 is an equidigital number, since it uses as much as digits as its factorization.

1798734621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599578210.

The product of its digits is 508032, while the sum is 48.

The square root of 1798734621 is about 42411.4916148914. The cubic root of 1798734621 is about 1216.1552844906.

The spelling of 1798734621 in words is "one billion, seven hundred ninety-eight million, seven hundred thirty-four thousand, six hundred twenty-one".