81014783 has 4 divisors (see below), whose sum is σ = 81323088. Its totient is φ = 80706480.

The previous prime is 81014767. The next prime is 81014797. The reversal of 81014783 is 38741018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38741018 = 2 ⋅19370509.

It is a cyclic number.

It is not a de Polignac number, because 81014783 - 2⁴ = 81014767 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81014183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153758 + ... + 154283.

It is an arithmetic number, because the mean of its divisors is an integer number (20330772).

Almost surely, 2^81014783 is an apocalyptic number.

81014783 is a deficient number, since it is larger than the sum of its proper divisors (308305).

81014783 is a wasteful number, since it uses less digits than its factorization.

81014783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308304.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 81014783 is about 9000.8212403091. The cubic root of 81014783 is about 432.7011914360.

The spelling of 81014783 in words is "eighty-one million, fourteen thousand, seven hundred eighty-three".