84720053 has 4 divisors (see below), whose sum is σ = 92421888. Its totient is φ = 77018220.

The previous prime is 84720029. The next prime is 84720073. The reversal of 84720053 is 35002748.

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 84720053 - 2⁶ = 84719989 is a prime.

It is a super-3 number, since 3×84720053³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 84719998 and 84720025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84720073) 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, 3850901 + ... + 3850922.

It is an arithmetic number, because the mean of its divisors is an integer number (23105472).

Almost surely, 2^84720053 is an apocalyptic number.

It is an amenable number.

84720053 is a deficient number, since it is larger than the sum of its proper divisors (7701835).

84720053 is a wasteful number, since it uses less digits than its factorization.

84720053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701834.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 84720053 is about 9204.3496782771. The cubic root of 84720053 is about 439.1997385680.

The spelling of 84720053 in words is "eighty-four million, seven hundred twenty thousand, fifty-three".