81693034 has 16 divisors (see below), whose sum is σ = 127762272. Its totient is φ = 39141648.

The previous prime is 81693023. The next prime is 81693043. The reversal of 81693034 is 43039618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4404 + ... + 13519.

It is an arithmetic number, because the mean of its divisors is an integer number (7985142).

Almost surely, 2^81693034 is an apocalyptic number.

81693034 is a deficient number, since it is larger than the sum of its proper divisors (46069238).

81693034 is a wasteful number, since it uses less digits than its factorization.

81693034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18021.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 81693034 is about 9038.4198840284. The cubic root of 81693034 is about 433.9053535815.

The spelling of 81693034 in words is "eighty-one million, six hundred ninety-three thousand, thirty-four".