84978501 has 4 divisors (see below), whose sum is σ = 113304672. Its totient is φ = 56652332.

The previous prime is 84978493. The next prime is 84978503. The reversal of 84978501 is 10587948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84978501 - 2³ = 84978493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84978503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14163081 + ... + 14163086.

It is an arithmetic number, because the mean of its divisors is an integer number (28326168).

Almost surely, 2^84978501 is an apocalyptic number.

It is an amenable number.

84978501 is a deficient number, since it is larger than the sum of its proper divisors (28326171).

84978501 is a wasteful number, since it uses less digits than its factorization.

84978501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28326170.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 84978501 is about 9218.3784365798. The cubic root of 84978501 is about 439.6458945053.

The spelling of 84978501 in words is "eighty-four million, nine hundred seventy-eight thousand, five hundred one".