99563837 has 2 divisors, whose sum is σ = 99563838. Its totient is φ = 99563836.

The previous prime is 99563833. The next prime is 99563843. The reversal of 99563837 is 73836599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98525476 + 1038361 = 9926^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 99563837 - 2² = 99563833 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99563831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49781918 + 49781919.

It is an arithmetic number, because the mean of its divisors is an integer number (49781919).

Almost surely, 2^99563837 is an apocalyptic number.

It is an amenable number.

99563837 is a deficient number, since it is larger than the sum of its proper divisors (1).

99563837 is an equidigital number, since it uses as much as digits as its factorization.

99563837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 50.

The square root of 99563837 is about 9978.1680182286. The cubic root of 99563837 is about 463.4830700876.

The spelling of 99563837 in words is "ninety-nine million, five hundred sixty-three thousand, eight hundred thirty-seven".