1020319973 has 4 divisors (see below), whose sum is σ = 1045205868. Its totient is φ = 995434080.

The previous prime is 1020319961. The next prime is 1020319999. The reversal of 1020319973 is 3799130201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3799130201 = 2999 ⋅1266799.

It can be written as a sum of positive squares in 2 ways, for example, as 450161089 + 570158884 = 21217^2 + 23878^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1020319973 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 (1020319873) 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, 12442886 + ... + 12442967.

It is an arithmetic number, because the mean of its divisors is an integer number (261301467).

Almost surely, 2^1020319973 is an apocalyptic number.

It is an amenable number.

1020319973 is a deficient number, since it is larger than the sum of its proper divisors (24885895).

1020319973 is an equidigital number, since it uses as much as digits as its factorization.

1020319973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24885894.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1020319973 is about 31942.4478241728. The cubic root of 1020319973 is about 1006.7279574079.

The spelling of 1020319973 in words is "one billion, twenty million, three hundred nineteen thousand, nine hundred seventy-three".