84591653 has 4 divisors (see below), whose sum is σ = 87320448. Its totient is φ = 81862860.

The previous prime is 84591613. The next prime is 84591671. The reversal of 84591653 is 35619548.

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 84591653 - 2¹⁰ = 84590629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84591653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84591613) 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, 1364351 + ... + 1364412.

It is an arithmetic number, because the mean of its divisors is an integer number (21830112).

Almost surely, 2^84591653 is an apocalyptic number.

It is an amenable number.

84591653 is a deficient number, since it is larger than the sum of its proper divisors (2728795).

84591653 is a wasteful number, since it uses less digits than its factorization.

84591653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728794.

The product of its digits is 129600, while the sum is 41.

The square root of 84591653 is about 9197.3720703253. The cubic root of 84591653 is about 438.9777456319.

The spelling of 84591653 in words is "eighty-four million, five hundred ninety-one thousand, six hundred fifty-three".