1673021842 has 4 divisors (see below), whose sum is σ = 2509532766. Its totient is φ = 836510920.

The previous prime is 1673021837. The next prime is 1673021843. The reversal of 1673021842 is 2481203761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2481203761 = 31 ⋅80038831.

It can be written as a sum of positive squares in only one way, i.e., 1164925161 + 508096681 = 34131^2 + 22541^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1673021798 and 1673021807.

It is not an unprimeable number, because it can be changed into a prime (1673021843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418255459 + ... + 418255462.

Almost surely, 2^1673021842 is an apocalyptic number.

1673021842 is a deficient number, since it is larger than the sum of its proper divisors (836510924).

1673021842 is an equidigital number, since it uses as much as digits as its factorization.

1673021842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836510923.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1673021842 is about 40902.5896735158. The cubic root of 1673021842 is about 1187.1361688274.

The spelling of 1673021842 in words is "one billion, six hundred seventy-three million, twenty-one thousand, eight hundred forty-two".