99978683 has 24 divisors (see below), whose sum is σ = 123222432. Its totient is φ = 79432704.

The previous prime is 99978667. The next prime is 99978691. The reversal of 99978683 is 38687999.

It is not a de Polignac number, because 99978683 - 2⁴ = 99978667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99978643) 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, 147341 + ... + 148017.

It is an arithmetic number, because the mean of its divisors is an integer number (5134268).

Almost surely, 2^99978683 is an apocalyptic number.

99978683 is a deficient number, since it is larger than the sum of its proper divisors (23243749).

99978683 is a wasteful number, since it uses less digits than its factorization.

99978683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 774 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 59.

The square root of 99978683 is about 9998.9340931921. The cubic root of 99978683 is about 464.1258994344.

The spelling of 99978683 in words is "ninety-nine million, nine hundred seventy-eight thousand, six hundred eighty-three".