81074603 has 4 divisors (see below), whose sum is σ = 82185288. Its totient is φ = 79963920.

The previous prime is 81074599. The next prime is 81074611. The reversal of 81074603 is 30647018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30647018 = 2 ⋅15323509.

It is a cyclic number.

It is not a de Polignac number, because 81074603 - 2² = 81074599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81074503) 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, 555233 + ... + 555378.

It is an arithmetic number, because the mean of its divisors is an integer number (20546322).

Almost surely, 2^81074603 is an apocalyptic number.

81074603 is a deficient number, since it is larger than the sum of its proper divisors (1110685).

81074603 is a wasteful number, since it uses less digits than its factorization.

81074603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110684.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 81074603 is about 9004.1436572280. The cubic root of 81074603 is about 432.8076650783.

The spelling of 81074603 in words is "eighty-one million, seventy-four thousand, six hundred three".