81483634 has 4 divisors (see below), whose sum is σ = 122225454. Its totient is φ = 40741816.

The previous prime is 81483629. The next prime is 81483643. The reversal of 81483634 is 43638418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43638418 = 2 ⋅21819209.

It can be written as a sum of positive squares in only one way, i.e., 43599609 + 37884025 = 6603^2 + 6155^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81483593 and 81483602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20370907 + ... + 20370910.

Almost surely, 2^81483634 is an apocalyptic number.

81483634 is a deficient number, since it is larger than the sum of its proper divisors (40741820).

81483634 is a wasteful number, since it uses less digits than its factorization.

81483634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40741819.

The product of its digits is 55296, while the sum is 37.

The square root of 81483634 is about 9026.8285682182. The cubic root of 81483634 is about 433.5342998145.

It can be divided in two parts, 814 and 83634, that added together give a palindrome (84448).

The spelling of 81483634 in words is "eighty-one million, four hundred eighty-three thousand, six hundred thirty-four".