80781607 has 2 divisors, whose sum is σ = 80781608. Its totient is φ = 80781606.

The previous prime is 80781601. The next prime is 80781641. The reversal of 80781607 is 70618708.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80781607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80781601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40390803 + 40390804.

It is an arithmetic number, because the mean of its divisors is an integer number (40390804).

Almost surely, 2^80781607 is an apocalyptic number.

80781607 is a deficient number, since it is larger than the sum of its proper divisors (1).

80781607 is an equidigital number, since it uses as much as digits as its factorization.

80781607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 80781607 is about 8987.8588662707. The cubic root of 80781607 is about 432.2856603308.

The spelling of 80781607 in words is "eighty million, seven hundred eighty-one thousand, six hundred seven".