100000073 has 2 divisors, whose sum is σ = 100000074. Its totient is φ = 100000072.

The previous prime is 100000049. The next prime is 100000081. The reversal of 100000073 is 370000001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73908409 + 26091664 = 8597^2 + 5108^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000073 - 2²² = 95805769 is a prime.

100000073 is a modest number, since divided by 73 gives 1 as remainder.

It is not a weakly prime, because it can be changed into another prime (100000673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000036 + 50000037.

It is an arithmetic number, because the mean of its divisors is an integer number (50000037).

Almost surely, 2^100000073 is an apocalyptic number.

It is an amenable number.

100000073 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000073 is an equidigital number, since it uses as much as digits as its factorization.

100000073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21, while the sum is 11.

The square root of 100000073 is about 10000.0036499993. The cubic root of 100000073 is about 464.1589963066.

Adding to 100000073 its reverse (370000001), we get a palindrome (470000074).

The spelling of 100000073 in words is "one hundred million, seventy-three", and thus it is an aban number.