81430701 has 12 divisors (see below), whose sum is σ = 119342496. Its totient is φ = 49351720.

The previous prime is 81430693. The next prime is 81430711. The reversal of 81430701 is 10703418.

It is not a de Polignac number, because 81430701 - 2³ = 81430693 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81430711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111801 + ... + 112526.

It is an arithmetic number, because the mean of its divisors is an integer number (9945208).

Almost surely, 2^81430701 is an apocalyptic number.

It is an amenable number.

81430701 is a deficient number, since it is larger than the sum of its proper divisors (37911795).

81430701 is a wasteful number, since it uses less digits than its factorization.

81430701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224352 (or 224341 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 81430701 is about 9023.8961097743. The cubic root of 81430701 is about 433.4404026684.

The spelling of 81430701 in words is "eighty-one million, four hundred thirty thousand, seven hundred one".