99720727 has 2 divisors, whose sum is σ = 99720728. Its totient is φ = 99720726.

The previous prime is 99720703. The next prime is 99720791. The reversal of 99720727 is 72702799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99720727 - 2¹¹ = 99718679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99723727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49860363 + 49860364.

It is an arithmetic number, because the mean of its divisors is an integer number (49860364).

Almost surely, 2^99720727 is an apocalyptic number.

99720727 is a deficient number, since it is larger than the sum of its proper divisors (1).

99720727 is an equidigital number, since it uses as much as digits as its factorization.

99720727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 99720727 is about 9986.0265871867. The cubic root of 99720727 is about 463.7263903529.

The spelling of 99720727 in words is "ninety-nine million, seven hundred twenty thousand, seven hundred twenty-seven".