109638499 has 2 divisors, whose sum is σ = 109638500. Its totient is φ = 109638498.

The previous prime is 109638479. The next prime is 109638509. The reversal of 109638499 is 994836901.

It is a strong prime.

It is an emirp because it is prime and its reverse (994836901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109638499 - 2²¹ = 107541347 is a prime.

It is not a weakly prime, because it can be changed into another prime (109638409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54819249 + 54819250.

It is an arithmetic number, because the mean of its divisors is an integer number (54819250).

Almost surely, 2^109638499 is an apocalyptic number.

109638499 is a deficient number, since it is larger than the sum of its proper divisors (1).

109638499 is an equidigital number, since it uses as much as digits as its factorization.

109638499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 109638499 is about 10470.8404151720. The cubic root of 109638499 is about 478.6165299526.

The spelling of 109638499 in words is "one hundred nine million, six hundred thirty-eight thousand, four hundred ninety-nine".