83949999 has 16 divisors (see below), whose sum is σ = 134657280. Its totient is φ = 45446400.

The previous prime is 83949989. The next prime is 83950021. The reversal of 83949999 is 99994938.

It is not a de Polignac number, because 83949999 - 2⁷ = 83949871 is a prime.

83949999 is a modest number, since divided by 9999 gives 8394 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83949949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104802 + ... + 105599.

It is an arithmetic number, because the mean of its divisors is an integer number (8416080).

Almost surely, 2^83949999 is an apocalyptic number.

83949999 is a deficient number, since it is larger than the sum of its proper divisors (50707281).

83949999 is a wasteful number, since it uses less digits than its factorization.

83949999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210430.

The product of its digits is 5668704, while the sum is 60.

The square root of 83949999 is about 9162.4232056809. The cubic root of 83949999 is about 437.8649997823.

It can be divided in two parts, 83949 and 999, that added together give a palindrome (84948).

The spelling of 83949999 in words is "eighty-three million, nine hundred forty-nine thousand, nine hundred ninety-nine".