97455478 has 4 divisors (see below), whose sum is σ = 146183220. Its totient is φ = 48727738.

The previous prime is 97455473. The next prime is 97455497. The reversal of 97455478 is 87455479.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87455479 = 173 ⋅505523.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97455473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24363868 + ... + 24363871.

It is an arithmetic number, because the mean of its divisors is an integer number (36545805).

Almost surely, 2^97455478 is an apocalyptic number.

97455478 is a deficient number, since it is larger than the sum of its proper divisors (48727742).

97455478 is a wasteful number, since it uses less digits than its factorization.

97455478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48727741.

The product of its digits is 1411200, while the sum is 49.

The square root of 97455478 is about 9871.9541125352. The cubic root of 97455478 is about 460.1881366536.

Subtracting from 97455478 its reverse (87455479), we obtain a palindrome (9999999).

The spelling of 97455478 in words is "ninety-seven million, four hundred fifty-five thousand, four hundred seventy-eight".