81469701 has 24 divisors (see below), whose sum is σ = 124319520. Its totient is φ = 51268896.

The previous prime is 81469697. The next prime is 81469711. The reversal of 81469701 is 10796418.

It is not a de Polignac number, because 81469701 - 2² = 81469697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81469711) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 58651 + ... + 60023.

It is an arithmetic number, because the mean of its divisors is an integer number (5179980).

Almost surely, 2^81469701 is an apocalyptic number.

It is an amenable number.

81469701 is a deficient number, since it is larger than the sum of its proper divisors (42849819).

81469701 is a wasteful number, since it uses less digits than its factorization.

81469701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745 (or 1742 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 81469701 is about 9026.0567802335. The cubic root of 81469701 is about 433.5095881948.

The spelling of 81469701 in words is "eighty-one million, four hundred sixty-nine thousand, seven hundred one".