99461978 has 16 divisors (see below), whose sum is σ = 186007104. Its totient is φ = 38751360.

The previous prime is 99461977. The next prime is 99461993. The reversal of 99461978 is 87916499.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99461977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322775 + ... + 323082.

It is an arithmetic number, because the mean of its divisors is an integer number (11625444).

Almost surely, 2^99461978 is an apocalyptic number.

99461978 is a deficient number, since it is larger than the sum of its proper divisors (86545126).

99461978 is a wasteful number, since it uses less digits than its factorization.

99461978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645877.

The product of its digits is 979776, while the sum is 53.

The square root of 99461978 is about 9973.0626188749. The cubic root of 99461978 is about 463.3249603695.

The spelling of 99461978 in words is "ninety-nine million, four hundred sixty-one thousand, nine hundred seventy-eight".