99877643 has 2 divisors, whose sum is σ = 99877644. Its totient is φ = 99877642.

The previous prime is 99877633. The next prime is 99877667. The reversal of 99877643 is 34677899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99877643 - 2⁴ = 99877627 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99877633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49938821 + 49938822.

It is an arithmetic number, because the mean of its divisors is an integer number (49938822).

Almost surely, 2^99877643 is an apocalyptic number.

99877643 is a deficient number, since it is larger than the sum of its proper divisors (1).

99877643 is an equidigital number, since it uses as much as digits as its factorization.

99877643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The square root of 99877643 is about 9993.8802774498. The cubic root of 99877643 is about 463.9694958023.

The spelling of 99877643 in words is "ninety-nine million, eight hundred seventy-seven thousand, six hundred forty-three".