83911005 has 64 divisors (see below), whose sum is σ = 155623680. Its totient is φ = 42861312.

The previous prime is 83910991. The next prime is 83911013. The reversal of 83911005 is 50011938.

It is not a de Polignac number, because 83911005 - 2⁹ = 83910493 is a prime.

It is a super-2 number, since 2×83911005² = 14082113520220050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 83911005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 534387 + ... + 534543.

It is an arithmetic number, because the mean of its divisors is an integer number (2431620).

Almost surely, 2^83911005 is an apocalyptic number.

It is an amenable number.

83911005 is a deficient number, since it is larger than the sum of its proper divisors (71712675).

83911005 is a wasteful number, since it uses less digits than its factorization.

83911005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 83911005 is about 9160.2950279999. The cubic root of 83911005 is about 437.7971945321.

The spelling of 83911005 in words is "eighty-three million, nine hundred eleven thousand, five".