100505499973 has 2 divisors, whose sum is σ = 100505499974. Its totient is φ = 100505499972.

The previous prime is 100505499949. The next prime is 100505500057. The reversal of 100505499973 is 379994505001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81329343489 + 19176156484 = 285183^2 + 138478^2 .

It is an emirp because it is prime and its reverse (379994505001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100505499973 - 2²¹ = 100503402821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100505499973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100505499943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50252749986 + 50252749987.

It is an arithmetic number, because the mean of its divisors is an integer number (50252749987).

Almost surely, 2^100505499973 is an apocalyptic number.

It is an amenable number.

100505499973 is a deficient number, since it is larger than the sum of its proper divisors (1).

100505499973 is an equidigital number, since it uses as much as digits as its factorization.

100505499973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1530900, while the sum is 52.

The spelling of 100505499973 in words is "one hundred billion, five hundred five million, four hundred ninety-nine thousand, nine hundred seventy-three".