83861645 has 8 divisors (see below), whose sum is σ = 115010304. Its totient is φ = 57505104.

The previous prime is 83861639. The next prime is 83861651. The reversal of 83861645 is 54616838.

It is an interprime number because it is at equal distance from previous prime (83861639) and next prime (83861651).

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

It is a cyclic number.

It is not a de Polignac number, because 83861645 - 2¹⁴ = 83845261 is a prime.

It is a super-3 number, since 3×83861645³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1197989 + ... + 1198058.

It is an arithmetic number, because the mean of its divisors is an integer number (14376288).

Almost surely, 2^83861645 is an apocalyptic number.

It is an amenable number.

83861645 is a deficient number, since it is larger than the sum of its proper divisors (31148659).

83861645 is a wasteful number, since it uses less digits than its factorization.

83861645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396059.

The product of its digits is 138240, while the sum is 41.

The square root of 83861645 is about 9157.6003953001. The cubic root of 83861645 is about 437.7113340892.

The spelling of 83861645 in words is "eighty-three million, eight hundred sixty-one thousand, six hundred forty-five".