84870013 has 8 divisors (see below), whose sum is σ = 86929848. Its totient is φ = 82827264.

The previous prime is 84870007. The next prime is 84870061. The reversal of 84870013 is 31007848.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36942084 + 47927929 = 6078^2 + 6923^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84870013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84870083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6081 + ... + 14377.

It is an arithmetic number, because the mean of its divisors is an integer number (10866231).

Almost surely, 2^84870013 is an apocalyptic number.

It is an amenable number.

84870013 is a deficient number, since it is larger than the sum of its proper divisors (2059835).

84870013 is a wasteful number, since it uses less digits than its factorization.

84870013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 84870013 is about 9212.4922252342. The cubic root of 84870013 is about 439.4587231822.

The spelling of 84870013 in words is "eighty-four million, eight hundred seventy thousand, thirteen".