99956387 has 2 divisors, whose sum is σ = 99956388. Its totient is φ = 99956386.

The previous prime is 99956377. The next prime is 99956471. The reversal of 99956387 is 78365999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99956387 - 2⁴ = 99956371 is a prime.

It is not a weakly prime, because it can be changed into another prime (99956317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49978193 + 49978194.

It is an arithmetic number, because the mean of its divisors is an integer number (49978194).

Almost surely, 2^99956387 is an apocalyptic number.

99956387 is a deficient number, since it is larger than the sum of its proper divisors (1).

99956387 is an equidigital number, since it uses as much as digits as its factorization.

99956387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 56.

The square root of 99956387 is about 9997.8191121864. The cubic root of 99956387 is about 464.0913956779.

The spelling of 99956387 in words is "ninety-nine million, nine hundred fifty-six thousand, three hundred eighty-seven".