84630813 has 4 divisors (see below), whose sum is σ = 112841088. Its totient is φ = 56420540.

The previous prime is 84630809. The next prime is 84630827. The reversal of 84630813 is 31803648.

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 84630813 - 2² = 84630809 is a prime.

It is a super-3 number, since 3×84630813³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84630853) 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, 14105133 + ... + 14105138.

It is an arithmetic number, because the mean of its divisors is an integer number (28210272).

Almost surely, 2^84630813 is an apocalyptic number.

It is an amenable number.

84630813 is a deficient number, since it is larger than the sum of its proper divisors (28210275).

84630813 is a wasteful number, since it uses less digits than its factorization.

84630813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28210274.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 84630813 is about 9199.5006929724. The cubic root of 84630813 is about 439.0454738137.

The spelling of 84630813 in words is "eighty-four million, six hundred thirty thousand, eight hundred thirteen".