83945649 has 8 divisors (see below), whose sum is σ = 111972832. Its totient is φ = 55941120.

The previous prime is 83945647. The next prime is 83945663. The reversal of 83945649 is 94654938.

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

It is not a de Polignac number, because 83945649 - 2¹ = 83945647 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 83945598 and 83945607.

It is not an unprimeable number, because it can be changed into a prime (83945647) 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, 7089 + ... + 14769.

It is an arithmetic number, because the mean of its divisors is an integer number (13996604).

Almost surely, 2^83945649 is an apocalyptic number.

It is an amenable number.

83945649 is a deficient number, since it is larger than the sum of its proper divisors (28027183).

83945649 is a wasteful number, since it uses less digits than its factorization.

83945649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11327.

The product of its digits is 933120, while the sum is 48.

The square root of 83945649 is about 9162.1858199886. The cubic root of 83945649 is about 437.8574367660.

The spelling of 83945649 in words is "eighty-three million, nine hundred forty-five thousand, six hundred forty-nine".