99909137 has 2 divisors, whose sum is σ = 99909138. Its totient is φ = 99909136.

The previous prime is 99909113. The next prime is 99909157. The reversal of 99909137 is 73190999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85951441 + 13957696 = 9271^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 99909137 - 2¹⁴ = 99892753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99909091 and 99909100.

It is not a weakly prime, because it can be changed into another prime (99909107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49954568 + 49954569.

It is an arithmetic number, because the mean of its divisors is an integer number (49954569).

Almost surely, 2^99909137 is an apocalyptic number.

It is an amenable number.

99909137 is a deficient number, since it is larger than the sum of its proper divisors (1).

99909137 is an equidigital number, since it uses as much as digits as its factorization.

99909137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 99909137 is about 9995.4558175203. The cubic root of 99909137 is about 464.0182578651.

The spelling of 99909137 in words is "ninety-nine million, nine hundred nine thousand, one hundred thirty-seven".