99709567 has 2 divisors, whose sum is σ = 99709568. Its totient is φ = 99709566.

The previous prime is 99709553. The next prime is 99709579. The reversal of 99709567 is 76590799.

It is a strong prime.

It is an emirp because it is prime and its reverse (76590799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99709567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99709507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49854783 + 49854784.

It is an arithmetic number, because the mean of its divisors is an integer number (49854784).

Almost surely, 2^99709567 is an apocalyptic number.

99709567 is a deficient number, since it is larger than the sum of its proper divisors (1).

99709567 is an equidigital number, since it uses as much as digits as its factorization.

99709567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1071630, while the sum is 52.

The square root of 99709567 is about 9985.4677907447. The cubic root of 99709567 is about 463.7090907746.

The spelling of 99709567 in words is "ninety-nine million, seven hundred nine thousand, five hundred sixty-seven".