81050692 has 6 divisors (see below), whose sum is σ = 141838718. Its totient is φ = 40525344.

The previous prime is 81050653. The next prime is 81050693. The reversal of 81050692 is 29605018.

It can be written as a sum of positive squares in only one way, i.e., 56310016 + 24740676 = 7504^2 + 4974^2 .

It is not an unprimeable number, because it can be changed into a prime (81050693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10131333 + ... + 10131340.

Almost surely, 2^81050692 is an apocalyptic number.

It is an amenable number.

81050692 is a deficient number, since it is larger than the sum of its proper divisors (60788026).

81050692 is a wasteful number, since it uses less digits than its factorization.

81050692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20262677 (or 20262675 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 81050692 is about 9002.8157817430. The cubic root of 81050692 is about 432.7651121651.

The spelling of 81050692 in words is "eighty-one million, fifty thousand, six hundred ninety-two".