84123440247 has 72 divisors (see below), whose sum is σ = 143146403712. Its totient is φ = 43453468800.

The previous prime is 84123440231. The next prime is 84123440267. The reversal of 84123440247 is 74204432148.

It is not a de Polignac number, because 84123440247 - 2⁴ = 84123440231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84123440267) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 205680579 + ... + 205680987.

It is an arithmetic number, because the mean of its divisors is an integer number (1988144496).

Almost surely, 2^84123440247 is an apocalyptic number.

84123440247 is a deficient number, since it is larger than the sum of its proper divisors (59022963465).

84123440247 is a wasteful number, since it uses less digits than its factorization.

84123440247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 39.

The spelling of 84123440247 in words is "eighty-four billion, one hundred twenty-three million, four hundred forty thousand, two hundred forty-seven".