84420475 has 6 divisors (see below), whose sum is σ = 104681420. Its totient is φ = 67536360.

The previous prime is 84420473. The next prime is 84420509. The reversal of 84420475 is 57402448.

It is a happy number.

It is not a de Polignac number, because 84420475 - 2¹ = 84420473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84420475.

It is not an unprimeable number, because it can be changed into a prime (84420473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1688385 + ... + 1688434.

Almost surely, 2^84420475 is an apocalyptic number.

84420475 is a deficient number, since it is larger than the sum of its proper divisors (20260945).

84420475 is a wasteful number, since it uses less digits than its factorization.

84420475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3376829 (or 3376824 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 84420475 is about 9188.0615474647. The cubic root of 84420475 is about 438.6814434432.

The spelling of 84420475 in words is "eighty-four million, four hundred twenty thousand, four hundred seventy-five".