478453397 has 4 divisors (see below), whose sum is σ = 494951820. Its totient is φ = 461954976.

The previous prime is 478453379. The next prime is 478453403. The reversal of 478453397 is 793354874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301855876 + 176597521 = 17374^2 + 13289^2 .

It is a cyclic number.

It is not a de Polignac number, because 478453397 - 2⁶ = 478453333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478453357) 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, 8249168 + ... + 8249225.

It is an arithmetic number, because the mean of its divisors is an integer number (123737955).

Almost surely, 2^478453397 is an apocalyptic number.

It is an amenable number.

478453397 is a deficient number, since it is larger than the sum of its proper divisors (16498423).

478453397 is a wasteful number, since it uses less digits than its factorization.

478453397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16498422.

The product of its digits is 2540160, while the sum is 50.

The square root of 478453397 is about 21873.5775994692. The cubic root of 478453397 is about 782.1316864724.

The spelling of 478453397 in words is "four hundred seventy-eight million, four hundred fifty-three thousand, three hundred ninety-seven".