84613531 has 4 divisors (see below), whose sum is σ = 84645000. Its totient is φ = 84582064.

The previous prime is 84613523. The next prime is 84613537. The reversal of 84613531 is 13531648.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84613531 - 2³ = 84613523 is a prime.

It is a super-2 number, since 2×84613531² = 14318899256575922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84613493 and 84613502.

It is not an unprimeable number, because it can be changed into a prime (84613537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11281 + ... + 17218.

It is an arithmetic number, because the mean of its divisors is an integer number (21161250).

Almost surely, 2^84613531 is an apocalyptic number.

84613531 is a deficient number, since it is larger than the sum of its proper divisors (31469).

84613531 is a wasteful number, since it uses less digits than its factorization.

84613531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31468.

The product of its digits is 8640, while the sum is 31.

The square root of 84613531 is about 9198.5613549076. The cubic root of 84613531 is about 439.0155867464.

The spelling of 84613531 in words is "eighty-four million, six hundred thirteen thousand, five hundred thirty-one".