84907478 has 4 divisors (see below), whose sum is σ = 127361220. Its totient is φ = 42453738.

The previous prime is 84907453. The next prime is 84907483. The reversal of 84907478 is 87470948.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21226868 + ... + 21226871.

It is an arithmetic number, because the mean of its divisors is an integer number (31840305).

Almost surely, 2^84907478 is an apocalyptic number.

84907478 is a deficient number, since it is larger than the sum of its proper divisors (42453742).

84907478 is a wasteful number, since it uses less digits than its factorization.

84907478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42453741.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 84907478 is about 9214.5253811577. The cubic root of 84907478 is about 439.5233785235.

The spelling of 84907478 in words is "eighty-four million, nine hundred seven thousand, four hundred seventy-eight".