99997759 has 2 divisors, whose sum is σ = 99997760. Its totient is φ = 99997758.

The previous prime is 99997691. The next prime is 99997769. The reversal of 99997759 is 95779999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99997759 - 2¹¹ = 99995711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99997759.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99997769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49998879 + 49998880.

It is an arithmetic number, because the mean of its divisors is an integer number (49998880).

Almost surely, 2^99997759 is an apocalyptic number.

99997759 is a deficient number, since it is larger than the sum of its proper divisors (1).

99997759 is an equidigital number, since it uses as much as digits as its factorization.

99997759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14467005, while the sum is 64.

The square root of 99997759 is about 9999.8879493722. The cubic root of 99997759 is about 464.1554160685.

The spelling of 99997759 in words is "ninety-nine million, nine hundred ninety-seven thousand, seven hundred fifty-nine".