84740509 has 4 divisors (see below), whose sum is σ = 96846304. Its totient is φ = 72634716.

The previous prime is 84740501. The next prime is 84740519. The reversal of 84740509 is 90504748.

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 not a de Polignac number, because 84740509 - 2³ = 84740501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84740501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6052887 + ... + 6052900.

It is an arithmetic number, because the mean of its divisors is an integer number (24211576).

Almost surely, 2^84740509 is an apocalyptic number.

It is an amenable number.

84740509 is a deficient number, since it is larger than the sum of its proper divisors (12105795).

84740509 is a wasteful number, since it uses less digits than its factorization.

84740509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12105794.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 84740509 is about 9205.4608249669. The cubic root of 84740509 is about 439.2350845753.

The spelling of 84740509 in words is "eighty-four million, seven hundred forty thousand, five hundred nine".