99980137 has 2 divisors, whose sum is σ = 99980138. Its totient is φ = 99980136.

The previous prime is 99980123. The next prime is 99980171. The reversal of 99980137 is 73108999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96609241 + 3370896 = 9829^2 + 1836^2 .

It is an emirp because it is prime and its reverse (73108999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99980137 - 2¹¹ = 99978089 is a prime.

It is not a weakly prime, because it can be changed into another prime (99980437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49990068 + 49990069.

It is an arithmetic number, because the mean of its divisors is an integer number (49990069).

Almost surely, 2^99980137 is an apocalyptic number.

It is an amenable number.

99980137 is a deficient number, since it is larger than the sum of its proper divisors (1).

99980137 is an equidigital number, since it uses as much as digits as its factorization.

99980137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 99980137 is about 9999.0068006778. The cubic root of 99980137 is about 464.1281493666.

The spelling of 99980137 in words is "ninety-nine million, nine hundred eighty thousand, one hundred thirty-seven".