1973979943 has 8 divisors (see below), whose sum is σ = 2126325600. Its totient is φ = 1821705888.

The previous prime is 1973979911. The next prime is 1973979983. The reversal of 1973979943 is 3499793791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1973979943 - 2⁵ = 1973979911 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 (1973979983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48513 + ... + 79381.

It is an arithmetic number, because the mean of its divisors is an integer number (265790700).

Almost surely, 2^1973979943 is an apocalyptic number.

1973979943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1973979943 is a deficient number, since it is larger than the sum of its proper divisors (152345657).

1973979943 is a wasteful number, since it uses less digits than its factorization.

1973979943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35801.

The product of its digits is 11573604, while the sum is 61.

The square root of 1973979943 is about 44429.4940664419. The cubic root of 1973979943 is about 1254.4333125103.

The spelling of 1973979943 in words is "one billion, nine hundred seventy-three million, nine hundred seventy-nine thousand, nine hundred forty-three".