99985427 has 2 divisors, whose sum is σ = 99985428. Its totient is φ = 99985426.

The previous prime is 99985423. The next prime is 99985441. The reversal of 99985427 is 72458999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99985427 - 2² = 99985423 is a prime.

It is a super-2 number, since 2×99985427² = 19994171224744658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99985423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992713 + 49992714.

It is an arithmetic number, because the mean of its divisors is an integer number (49992714).

Almost surely, 2^99985427 is an apocalyptic number.

99985427 is a deficient number, since it is larger than the sum of its proper divisors (1).

99985427 is an equidigital number, since it uses as much as digits as its factorization.

99985427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 99985427 is about 9999.2713234515. The cubic root of 99985427 is about 464.1363349746.

The spelling of 99985427 in words is "ninety-nine million, nine hundred eighty-five thousand, four hundred twenty-seven".