1993247101 has 4 divisors (see below), whose sum is σ = 1993337500. Its totient is φ = 1993156704.

The previous prime is 1993247099. The next prime is 1993247129. The reversal of 1993247101 is 1017423991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 771395076 + 1221852025 = 27774^2 + 34955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1993247101 - 2¹ = 1993247099 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 (1993247131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12025 + ... + 64273.

It is an arithmetic number, because the mean of its divisors is an integer number (498334375).

Almost surely, 2^1993247101 is an apocalyptic number.

It is an amenable number.

1993247101 is a deficient number, since it is larger than the sum of its proper divisors (90399).

1993247101 is an equidigital number, since it uses as much as digits as its factorization.

1993247101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90398.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1993247101 is about 44645.7960058951. The cubic root of 1993247101 is about 1258.5014310039.

The spelling of 1993247101 in words is "one billion, nine hundred ninety-three million, two hundred forty-seven thousand, one hundred one".