83945861 has 4 divisors (see below), whose sum is σ = 86653824. Its totient is φ = 81237900.

The previous prime is 83945833. The next prime is 83945867. The reversal of 83945861 is 16854938.

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 83945861 - 2¹⁴ = 83929477 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 (83945867) 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, 1353935 + ... + 1353996.

It is an arithmetic number, because the mean of its divisors is an integer number (21663456).

Almost surely, 2^83945861 is an apocalyptic number.

It is an amenable number.

83945861 is a deficient number, since it is larger than the sum of its proper divisors (2707963).

83945861 is a wasteful number, since it uses less digits than its factorization.

83945861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707962.

The product of its digits is 207360, while the sum is 44.

The square root of 83945861 is about 9162.1973892729. The cubic root of 83945861 is about 437.8578053604.

The spelling of 83945861 in words is "eighty-three million, nine hundred forty-five thousand, eight hundred sixty-one".