81455703 has 8 divisors (see below), whose sum is σ = 124123008. Its totient is φ = 46546104.

The previous prime is 81455701. The next prime is 81455707. The reversal of 81455703 is 30755418.

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

It is not a de Polignac number, because 81455703 - 2¹ = 81455701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81455701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1939401 + ... + 1939442.

It is an arithmetic number, because the mean of its divisors is an integer number (15515376).

Almost surely, 2^81455703 is an apocalyptic number.

81455703 is a deficient number, since it is larger than the sum of its proper divisors (42667305).

81455703 is a wasteful number, since it uses less digits than its factorization.

81455703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878853.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 81455703 is about 9025.2813252552. The cubic root of 81455703 is about 433.4847584535.

The spelling of 81455703 in words is "eighty-one million, four hundred fifty-five thousand, seven hundred three".