83949889 has 4 divisors (see below), whose sum is σ = 85902256. Its totient is φ = 81997524.

The previous prime is 83949883. The next prime is 83949913. The reversal of 83949889 is 98894938.

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 83949889 - 2³ = 83949881 is a prime.

It is a super-2 number, since 2×83949889² = 14095167726224642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83949881) 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, 976119 + ... + 976204.

It is an arithmetic number, because the mean of its divisors is an integer number (21475564).

Almost surely, 2^83949889 is an apocalyptic number.

It is an amenable number.

83949889 is a deficient number, since it is larger than the sum of its proper divisors (1952367).

83949889 is a wasteful number, since it uses less digits than its factorization.

83949889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952366.

The product of its digits is 4478976, while the sum is 58.

The square root of 83949889 is about 9162.4172029001. The cubic root of 83949889 is about 437.8648085369.

The spelling of 83949889 in words is "eighty-three million, nine hundred forty-nine thousand, eight hundred eighty-nine".