83971155 has 8 divisors (see below), whose sum is σ = 134353872. Its totient is φ = 44784608.

The previous prime is 83971141. The next prime is 83971171. The reversal of 83971155 is 55117938.

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

It is a cyclic number.

It is not a de Polignac number, because 83971155 - 2⁹ = 83970643 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2799024 + ... + 2799053.

It is an arithmetic number, because the mean of its divisors is an integer number (16794234).

Almost surely, 2^83971155 is an apocalyptic number.

83971155 is a deficient number, since it is larger than the sum of its proper divisors (50382717).

83971155 is a wasteful number, since it uses less digits than its factorization.

83971155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5598085.

The product of its digits is 37800, while the sum is 39.

The square root of 83971155 is about 9163.5776310347. The cubic root of 83971155 is about 437.9017783966.

The spelling of 83971155 in words is "eighty-three million, nine hundred seventy-one thousand, one hundred fifty-five".