99646427 has 2 divisors, whose sum is σ = 99646428. Its totient is φ = 99646426.

The previous prime is 99646409. The next prime is 99646541. The reversal of 99646427 is 72464699.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (72464699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99646427 - 2⁶ = 99646363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99646727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49823213 + 49823214.

It is an arithmetic number, because the mean of its divisors is an integer number (49823214).

Almost surely, 2^99646427 is an apocalyptic number.

99646427 is a deficient number, since it is larger than the sum of its proper divisors (1).

99646427 is an equidigital number, since it uses as much as digits as its factorization.

99646427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 99646427 is about 9982.3056955796. The cubic root of 99646427 is about 463.6111905256.

The spelling of 99646427 in words is "ninety-nine million, six hundred forty-six thousand, four hundred twenty-seven".