1993742937 has 8 divisors (see below), whose sum is σ = 2953693280. Its totient is φ = 1329161940.

The previous prime is 1993742921. The next prime is 1993742951. The reversal of 1993742937 is 7392473991.

It is not a de Polignac number, because 1993742937 - 2⁴ = 1993742921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1993742237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36921139 + ... + 36921192.

It is an arithmetic number, because the mean of its divisors is an integer number (369211660).

Almost surely, 2^1993742937 is an apocalyptic number.

It is an amenable number.

1993742937 is a deficient number, since it is larger than the sum of its proper divisors (959950343).

1993742937 is an equidigital number, since it uses as much as digits as its factorization.

1993742937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73842340 (or 73842334 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 1993742937 is about 44651.3486582432. The cubic root of 1993742937 is about 1258.6057764176.

The spelling of 1993742937 in words is "one billion, nine hundred ninety-three million, seven hundred forty-two thousand, nine hundred thirty-seven".