84217137 has 4 divisors (see below), whose sum is σ = 112289520. Its totient is φ = 56144756.

The previous prime is 84217123. The next prime is 84217153. The reversal of 84217137 is 73171248.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 84217137 - 2⁷ = 84217009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84217098 and 84217107.

It is not an unprimeable number, because it can be changed into a prime (84217117) 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, 14036187 + ... + 14036192.

It is an arithmetic number, because the mean of its divisors is an integer number (28072380).

Almost surely, 2^84217137 is an apocalyptic number.

It is an amenable number.

84217137 is a deficient number, since it is larger than the sum of its proper divisors (28072383).

84217137 is a wasteful number, since it uses less digits than its factorization.

84217137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28072382.

The product of its digits is 9408, while the sum is 33.

The square root of 84217137 is about 9176.9895390591. The cubic root of 84217137 is about 438.3289526502.

The spelling of 84217137 in words is "eighty-four million, two hundred seventeen thousand, one hundred thirty-seven".