1973873641 has 4 divisors (see below), whose sum is σ = 1975752784. Its totient is φ = 1971994500.

The previous prime is 1973873623. The next prime is 1973873663. The reversal of 1973873641 is 1463783791.

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 a cyclic number.

It is not a de Polignac number, because 1973873641 - 2⁵ = 1973873609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1973813641) 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, 937995 + ... + 940096.

It is an arithmetic number, because the mean of its divisors is an integer number (493938196).

Almost surely, 2^1973873641 is an apocalyptic number.

It is an amenable number.

1973873641 is a deficient number, since it is larger than the sum of its proper divisors (1879143).

1973873641 is a wasteful number, since it uses less digits than its factorization.

1973873641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879142.

The product of its digits is 762048, while the sum is 49.

The square root of 1973873641 is about 44428.2977504203. The cubic root of 1973873641 is about 1254.4107943545.

The spelling of 1973873641 in words is "one billion, nine hundred seventy-three million, eight hundred seventy-three thousand, six hundred forty-one".