84390043501 has 4 divisors (see below), whose sum is σ = 84391859772. Its totient is φ = 84388227232.

The previous prime is 84390043483. The next prime is 84390043537. The reversal of 84390043501 is 10534009348.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14720968900 + 69669074601 = 121330^2 + 263949^2 .

It is a cyclic number.

It is not a de Polignac number, because 84390043501 - 2¹¹ = 84390041453 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 (84390041501) 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, 836560 + ... + 931993.

It is an arithmetic number, because the mean of its divisors is an integer number (21097964943).

Almost surely, 2^84390043501 is an apocalyptic number.

It is an amenable number.

84390043501 is a deficient number, since it is larger than the sum of its proper divisors (1816271).

84390043501 is a wasteful number, since it uses less digits than its factorization.

84390043501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816270.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 84390043501 in words is "eighty-four billion, three hundred ninety million, forty-three thousand, five hundred one".