99670478 has 8 divisors (see below), whose sum is σ = 149709168. Its totient is φ = 49767424.

The previous prime is 99670471. The next prime is 99670481. The reversal of 99670478 is 87407699.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99670471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32051 + ... + 35022.

It is an arithmetic number, because the mean of its divisors is an integer number (18713646).

Almost surely, 2^99670478 is an apocalyptic number.

99670478 is a deficient number, since it is larger than the sum of its proper divisors (50038690).

99670478 is a wasteful number, since it uses less digits than its factorization.

99670478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67818.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 99670478 is about 9983.5103044971. The cubic root of 99670478 is about 463.6484871156.

The spelling of 99670478 in words is "ninety-nine million, six hundred seventy thousand, four hundred seventy-eight".