478697499 has 16 divisors (see below), whose sum is σ = 810493440. Its totient is φ = 273541320.

The previous prime is 478697489. The next prime is 478697501. The reversal of 478697499 is 994796874.

478697499 is a `hidden beast` number, since 478 + 6 + 9 + 74 + 99 = 666.

It is not a de Polignac number, because 478697499 - 2⁸ = 478697243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (478697489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266207 + ... + 1266584.

It is an arithmetic number, because the mean of its divisors is an integer number (50655840).

Almost surely, 2^478697499 is an apocalyptic number.

478697499 is a deficient number, since it is larger than the sum of its proper divisors (331795941).

478697499 is a wasteful number, since it uses less digits than its factorization.

478697499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532807 (or 2532801 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 478697499 is about 21879.1567250660. The cubic root of 478697499 is about 782.2646757045.

The spelling of 478697499 in words is "four hundred seventy-eight million, six hundred ninety-seven thousand, four hundred ninety-nine".