99909767 has 2 divisors, whose sum is σ = 99909768. Its totient is φ = 99909766.

The previous prime is 99909739. The next prime is 99909779. The reversal of 99909767 is 76790999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99909767 - 2⁶ = 99909703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99909067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49954883 + 49954884.

It is an arithmetic number, because the mean of its divisors is an integer number (49954884).

Almost surely, 2^99909767 is an apocalyptic number.

99909767 is a deficient number, since it is larger than the sum of its proper divisors (1).

99909767 is an equidigital number, since it uses as much as digits as its factorization.

99909767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1928934, while the sum is 56.

The square root of 99909767 is about 9995.4873317913. The cubic root of 99909767 is about 464.0192331876.

The spelling of 99909767 in words is "ninety-nine million, nine hundred nine thousand, seven hundred sixty-seven".