99638597 has 4 divisors (see below), whose sum is σ = 99684780. Its totient is φ = 99592416.

The previous prime is 99638533. The next prime is 99638629. The reversal of 99638597 is 79583699.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35414401 + 64224196 = 5951^2 + 8014^2 .

It is a cyclic number.

It is not a de Polignac number, because 99638597 - 2⁶ = 99638533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99688597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19688 + ... + 24225.

It is an arithmetic number, because the mean of its divisors is an integer number (24921195).

Almost surely, 2^99638597 is an apocalyptic number.

It is an amenable number.

99638597 is a deficient number, since it is larger than the sum of its proper divisors (46183).

99638597 is a wasteful number, since it uses less digits than its factorization.

99638597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46182.

The product of its digits is 3674160, while the sum is 56.

The square root of 99638597 is about 9981.9134939149. The cubic root of 99638597 is about 463.5990470205.

It can be divided in two parts, 996 and 38597, that added together give a palindrome (39593).

The spelling of 99638597 in words is "ninety-nine million, six hundred thirty-eight thousand, five hundred ninety-seven".