83961958 has 4 divisors (see below), whose sum is σ = 125942940. Its totient is φ = 41980978.

The previous prime is 83961923. The next prime is 83961959. The reversal of 83961958 is 85916938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85916938 = 2 ⋅42958469.

It is a super-2 number, since 2×83961958² = 14099220782387528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83961959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20990488 + ... + 20990491.

It is an arithmetic number, because the mean of its divisors is an integer number (31485735).

Almost surely, 2^83961958 is an apocalyptic number.

83961958 is a deficient number, since it is larger than the sum of its proper divisors (41980982).

83961958 is a wasteful number, since it uses less digits than its factorization.

83961958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41980981.

The product of its digits is 466560, while the sum is 49.

The square root of 83961958 is about 9163.0757936405. The cubic root of 83961958 is about 437.8857906458.

The spelling of 83961958 in words is "eighty-three million, nine hundred sixty-one thousand, nine hundred fifty-eight".