83911481 has 4 divisors (see below), whose sum is σ = 84208272. Its totient is φ = 83614692.

The previous prime is 83911459. The next prime is 83911489. The reversal of 83911481 is 18411938.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18411938 = 2 ⋅9205969.

It is a cyclic number.

It is not a de Polignac number, because 83911481 - 2¹⁸ = 83649337 is a prime.

It is a super-2 number, since 2×83911481² = 14082273287226722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83911489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147971 + ... + 148536.

It is an arithmetic number, because the mean of its divisors is an integer number (21052068).

Almost surely, 2^83911481 is an apocalyptic number.

It is an amenable number.

83911481 is a deficient number, since it is larger than the sum of its proper divisors (296791).

83911481 is a wasteful number, since it uses less digits than its factorization.

83911481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296790.

The product of its digits is 6912, while the sum is 35.

The square root of 83911481 is about 9160.3210096590. The cubic root of 83911481 is about 437.7980223578.

The spelling of 83911481 in words is "eighty-three million, nine hundred eleven thousand, four hundred eighty-one".