81798094 has 16 divisors (see below), whose sum is σ = 140345856. Its totient is φ = 35026200.

The previous prime is 81798049. The next prime is 81798109. The reversal of 81798094 is 49089718.

It is a happy number.

It is a congruent number.

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, 24039 + ... + 27229.

It is an arithmetic number, because the mean of its divisors is an integer number (8771616).

Almost surely, 2^81798094 is an apocalyptic number.

81798094 is a deficient number, since it is larger than the sum of its proper divisors (58547762).

81798094 is a wasteful number, since it uses less digits than its factorization.

81798094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 81798094 is about 9044.2298732396. The cubic root of 81798094 is about 434.0912795469.

The spelling of 81798094 in words is "eighty-one million, seven hundred ninety-eight thousand, ninety-four".