99975647 has 2 divisors, whose sum is σ = 99975648. Its totient is φ = 99975646.

The previous prime is 99975637. The next prime is 99975653. The reversal of 99975647 is 74657999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99975647 - 2¹² = 99971551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99975592 and 99975601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99975607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49987823 + 49987824.

It is an arithmetic number, because the mean of its divisors is an integer number (49987824).

Almost surely, 2^99975647 is an apocalyptic number.

99975647 is a deficient number, since it is larger than the sum of its proper divisors (1).

99975647 is an equidigital number, since it uses as much as digits as its factorization.

99975647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 56.

The square root of 99975647 is about 9998.7822758574. The cubic root of 99975647 is about 464.1212014313.

The spelling of 99975647 in words is "ninety-nine million, nine hundred seventy-five thousand, six hundred forty-seven".