102745780993 has 4 divisors (see below), whose sum is σ = 102965793840. Its totient is φ = 102525768148.

The previous prime is 102745780979. The next prime is 102745780999. The reversal of 102745780993 is 399087547201.

It is a happy number.

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 102745780993 - 2²⁹ = 102208910081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102745780999) 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, 110005723 + ... + 110006656.

It is an arithmetic number, because the mean of its divisors is an integer number (25741448460).

Almost surely, 2^102745780993 is an apocalyptic number.

It is an amenable number.

102745780993 is a deficient number, since it is larger than the sum of its proper divisors (220012847).

102745780993 is an equidigital number, since it uses as much as digits as its factorization.

102745780993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220012846.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 102745780993 in words is "one hundred two billion, seven hundred forty-five million, seven hundred eighty thousand, nine hundred ninety-three".