81461733 has 4 divisors (see below), whose sum is σ = 108615648. Its totient is φ = 54307820.

The previous prime is 81461687. The next prime is 81461747. The reversal of 81461733 is 33716418.

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.

It is a cyclic number.

It is not a de Polignac number, because 81461733 - 2¹² = 81457637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81461694 and 81461703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81461333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13576953 + ... + 13576958.

It is an arithmetic number, because the mean of its divisors is an integer number (27153912).

Almost surely, 2^81461733 is an apocalyptic number.

It is an amenable number.

81461733 is a deficient number, since it is larger than the sum of its proper divisors (27153915).

81461733 is a wasteful number, since it uses less digits than its factorization.

81461733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27153914.

The product of its digits is 12096, while the sum is 33.

The square root of 81461733 is about 9025.6153806818. The cubic root of 81461733 is about 433.4954548546.

The spelling of 81461733 in words is "eighty-one million, four hundred sixty-one thousand, seven hundred thirty-three".