99420887 has 6 divisors (see below), whose sum is σ = 102181968. Its totient is φ = 96732504.

The previous prime is 99420877. The next prime is 99420889. The reversal of 99420887 is 78802499.

It is not a de Polignac number, because 99420887 - 2⁶ = 99420823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99420889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34943 + ... + 37680.

It is an arithmetic number, because the mean of its divisors is an integer number (17030328).

Almost surely, 2^99420887 is an apocalyptic number.

99420887 is a deficient number, since it is larger than the sum of its proper divisors (2761081).

99420887 is an equidigital number, since it uses as much as digits as its factorization.

99420887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72697 (or 72660 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 99420887 is about 9971.0023066891. The cubic root of 99420887 is about 463.2611466766.

The spelling of 99420887 in words is "ninety-nine million, four hundred twenty thousand, eight hundred eighty-seven".