99878001 has 24 divisors (see below), whose sum is σ = 142481664. Its totient is φ = 62166720.

The previous prime is 99877993. The next prime is 99878027. The reversal of 99878001 is 10087899.

It is not a de Polignac number, because 99878001 - 2³ = 99877993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99878071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77575 + ... + 78851.

It is an arithmetic number, because the mean of its divisors is an integer number (5936736).

Almost surely, 2^99878001 is an apocalyptic number.

It is an amenable number.

99878001 is a deficient number, since it is larger than the sum of its proper divisors (42603663).

99878001 is a wasteful number, since it uses less digits than its factorization.

99878001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 99878001 is about 9993.8981883948. The cubic root of 99878001 is about 463.9700501502.

The spelling of 99878001 in words is "ninety-nine million, eight hundred seventy-eight thousand, one".