1021723889674 has 4 divisors (see below), whose sum is σ = 1532585834514. Its totient is φ = 510861944836.

The previous prime is 1021723889663. The next prime is 1021723889737. The reversal of 1021723889674 is 4769883271201.

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., 536033372449 + 485690517225 = 732143^2 + 696915^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255430972417 + ... + 255430972420.

Almost surely, 2^{1021723889674} is an apocalyptic number.

1021723889674 is a deficient number, since it is larger than the sum of its proper divisors (510861944840).

1021723889674 is an equidigital number, since it uses as much as digits as its factorization.

1021723889674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510861944839.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 1021723889674 in words is "one trillion, twenty-one billion, seven hundred twenty-three million, eight hundred eighty-nine thousand, six hundred seventy-four".