81003463 has 2 divisors, whose sum is σ = 81003464. Its totient is φ = 81003462.

The previous prime is 81003437. The next prime is 81003509. The reversal of 81003463 is 36430018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81003463 - 2⁵ = 81003431 is a prime.

It is a super-2 number, since 2×81003463² = 13123122035984738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81003563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40501731 + 40501732.

It is an arithmetic number, because the mean of its divisors is an integer number (40501732).

Almost surely, 2^81003463 is an apocalyptic number.

81003463 is a deficient number, since it is larger than the sum of its proper divisors (1).

81003463 is an equidigital number, since it uses as much as digits as its factorization.

81003463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 81003463 is about 9000.1923868326. The cubic root of 81003463 is about 432.6810370664.

The spelling of 81003463 in words is "eighty-one million, three thousand, four hundred sixty-three".