84250639 has 4 divisors (see below), whose sum is σ = 91909800. Its totient is φ = 76591480.

The previous prime is 84250637. The next prime is 84250651. The reversal of 84250639 is 93605248.

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

It is a cyclic number.

It is not a de Polignac number, because 84250639 - 2¹ = 84250637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84250598 and 84250607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84250637) 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, 3829564 + ... + 3829585.

It is an arithmetic number, because the mean of its divisors is an integer number (22977450).

Almost surely, 2^84250639 is an apocalyptic number.

84250639 is a deficient number, since it is larger than the sum of its proper divisors (7659161).

84250639 is a wasteful number, since it uses less digits than its factorization.

84250639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659160.

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

The square root of 84250639 is about 9178.8146838249. The cubic root of 84250639 is about 438.3870680975.

The spelling of 84250639 in words is "eighty-four million, two hundred fifty thousand, six hundred thirty-nine".