1373821898 has 4 divisors (see below), whose sum is σ = 2060732850. Its totient is φ = 686910948.

The previous prime is 1373821873. The next prime is 1373821907. The reversal of 1373821898 is 8981283731.

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

It can be written as a sum of positive squares in only one way, i.e., 1260037009 + 113784889 = 35497^2 + 10667^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343455473 + ... + 343455476.

Almost surely, 2^1373821898 is an apocalyptic number.

1373821898 is a deficient number, since it is larger than the sum of its proper divisors (686910952).

1373821898 is an equidigital number, since it uses as much as digits as its factorization.

1373821898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686910951.

The product of its digits is 580608, while the sum is 50.

The square root of 1373821898 is about 37065.1035072074. The cubic root of 1373821898 is about 1111.6723696430.

The spelling of 1373821898 in words is "one billion, three hundred seventy-three million, eight hundred twenty-one thousand, eight hundred ninety-eight".