81734667 has 16 divisors (see below), whose sum is σ = 125006592. Its totient is φ = 46533600.

The previous prime is 81734603. The next prime is 81734683. The reversal of 81734667 is 76643718.

It is not a de Polignac number, because 81734667 - 2⁶ = 81734603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81734567) 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, 1209 + ... + 12842.

It is an arithmetic number, because the mean of its divisors is an integer number (7812912).

Almost surely, 2^81734667 is an apocalyptic number.

81734667 is a deficient number, since it is larger than the sum of its proper divisors (43271925).

81734667 is a wasteful number, since it uses less digits than its factorization.

81734667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14338.

The product of its digits is 169344, while the sum is 42.

The square root of 81734667 is about 9040.7227034126. The cubic root of 81734667 is about 433.9790510675.

The spelling of 81734667 in words is "eighty-one million, seven hundred thirty-four thousand, six hundred sixty-seven".