84111553 has 4 divisors (see below), whose sum is σ = 84385840. Its totient is φ = 83837268.

The previous prime is 84111539. The next prime is 84111611. The reversal of 84111553 is 35511148.

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 a de Polignac number, because none of the positive numbers 2^k-84111553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84111653) 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, 136683 + ... + 137296.

It is an arithmetic number, because the mean of its divisors is an integer number (21096460).

Almost surely, 2^84111553 is an apocalyptic number.

It is an amenable number.

84111553 is a deficient number, since it is larger than the sum of its proper divisors (274287).

84111553 is a wasteful number, since it uses less digits than its factorization.

84111553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274286.

The product of its digits is 2400, while the sum is 28.

The square root of 84111553 is about 9171.2350858540. The cubic root of 84111553 is about 438.1456966840.

The spelling of 84111553 in words is "eighty-four million, one hundred eleven thousand, five hundred fifty-three".