81677003 has 2 divisors, whose sum is σ = 81677004. Its totient is φ = 81677002.

The previous prime is 81676981. The next prime is 81677039. The reversal of 81677003 is 30077618.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81677003 - 2⁸ = 81676747 is a prime.

It is a super-2 number, since 2×81677003² = 13342265638124018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (81677053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40838501 + 40838502.

It is an arithmetic number, because the mean of its divisors is an integer number (40838502).

Almost surely, 2^81677003 is an apocalyptic number.

81677003 is a deficient number, since it is larger than the sum of its proper divisors (1).

81677003 is an equidigital number, since it uses as much as digits as its factorization.

81677003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 81677003 is about 9037.5330151541. The cubic root of 81677003 is about 433.8769693100.

The spelling of 81677003 in words is "eighty-one million, six hundred seventy-seven thousand, three".