81429034 has 8 divisors (see below), whose sum is σ = 125122788. Its totient is φ = 39721440.

The previous prime is 81429011. The next prime is 81429107. The reversal of 81429034 is 43092418.

It can be written as a sum of positive squares in 2 ways, for example, as 80946009 + 483025 = 8997^2 + 695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81428987 and 81429005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496437 + ... + 496600.

Almost surely, 2^81429034 is an apocalyptic number.

81429034 is a deficient number, since it is larger than the sum of its proper divisors (43693754).

81429034 is a wasteful number, since it uses less digits than its factorization.

81429034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993080.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 81429034 is about 9023.8037434333. The cubic root of 81429034 is about 433.4374449384.

The spelling of 81429034 in words is "eighty-one million, four hundred twenty-nine thousand, thirty-four".