81354753 has 32 divisors (see below), whose sum is σ = 125030400. Its totient is φ = 52245648.

The previous prime is 81354743. The next prime is 81354761. The reversal of 81354753 is 35745318.

It is not a de Polignac number, because 81354753 - 2⁴ = 81354737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81354733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91276 + ... + 92162.

It is an arithmetic number, because the mean of its divisors is an integer number (3907200).

Almost surely, 2^81354753 is an apocalyptic number.

It is an amenable number.

81354753 is a deficient number, since it is larger than the sum of its proper divisors (43675647).

81354753 is a wasteful number, since it uses less digits than its factorization.

81354753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018 (or 1012 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 81354753 is about 9019.6869679607. The cubic root of 81354753 is about 433.3056084168.

The spelling of 81354753 in words is "eighty-one million, three hundred fifty-four thousand, seven hundred fifty-three".