84640775 has 12 divisors (see below), whose sum is σ = 105129432. Its totient is φ = 67599840.

The previous prime is 84640753. The next prime is 84640781. The reversal of 84640775 is 57704648.

It is not a de Polignac number, because 84640775 - 2⁶ = 84640711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14597 + ... + 19553.

It is an arithmetic number, because the mean of its divisors is an integer number (8760786).

Almost surely, 2^84640775 is an apocalyptic number.

84640775 is a deficient number, since it is larger than the sum of its proper divisors (20488657).

84640775 is a wasteful number, since it uses less digits than its factorization.

84640775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5650 (or 5645 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 84640775 is about 9200.0421194688. The cubic root of 84640775 is about 439.0627000037.

The spelling of 84640775 in words is "eighty-four million, six hundred forty thousand, seven hundred seventy-five".