83961071 has 16 divisors (see below), whose sum is σ = 89056800. Its totient is φ = 79065600.

The previous prime is 83961067. The next prime is 83961083. The reversal of 83961071 is 17016938.

It is a cyclic number.

It is not a de Polignac number, because 83961071 - 2² = 83961067 is a prime.

It is a super-2 number, since 2×83961071² = 14098922886934082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83961041) 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, 147275 + ... + 147843.

It is an arithmetic number, because the mean of its divisors is an integer number (5566050).

Almost surely, 2^83961071 is an apocalyptic number.

83961071 is a deficient number, since it is larger than the sum of its proper divisors (5095729).

83961071 is a wasteful number, since it uses less digits than its factorization.

83961071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 83961071 is about 9163.0273927343. The cubic root of 83961071 is about 437.8842486536.

The spelling of 83961071 in words is "eighty-three million, nine hundred sixty-one thousand, seventy-one".