99787147 has 2 divisors, whose sum is σ = 99787148. Its totient is φ = 99787146.

The previous prime is 99787123. The next prime is 99787169. The reversal of 99787147 is 74178799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99787147 - 2¹¹ = 99785099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99787094 and 99787103.

It is not a weakly prime, because it can be changed into another prime (99787847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49893573 + 49893574.

It is an arithmetic number, because the mean of its divisors is an integer number (49893574).

Almost surely, 2^99787147 is an apocalyptic number.

99787147 is a deficient number, since it is larger than the sum of its proper divisors (1).

99787147 is an equidigital number, since it uses as much as digits as its factorization.

99787147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 52.

The square root of 99787147 is about 9989.3516806648. The cubic root of 99787147 is about 463.8293240556.

The spelling of 99787147 in words is "ninety-nine million, seven hundred eighty-seven thousand, one hundred forty-seven".