83891995 has 16 divisors (see below), whose sum is σ = 110108160. Its totient is φ = 60853600.

The previous prime is 83891993. The next prime is 83892013. The reversal of 83891995 is 59919838.

It is not a de Polignac number, because 83891995 - 2¹ = 83891993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83891993) 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, 21936 + ... + 25474.

It is an arithmetic number, because the mean of its divisors is an integer number (6881760).

Almost surely, 2^83891995 is an apocalyptic number.

83891995 is a deficient number, since it is larger than the sum of its proper divisors (26216165).

83891995 is a wasteful number, since it uses less digits than its factorization.

83891995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986.

The product of its digits is 699840, while the sum is 52.

The square root of 83891995 is about 9159.2573388894. The cubic root of 83891995 is about 437.7641311167.

The spelling of 83891995 in words is "eighty-three million, eight hundred ninety-one thousand, nine hundred ninety-five".