781342607 has 2 divisors, whose sum is σ = 781342608. Its totient is φ = 781342606.

The previous prime is 781342603. The next prime is 781342651. The reversal of 781342607 is 706243187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 781342607 - 2² = 781342603 is a prime.

It is a super-2 number, since 2×781342607² = 1220992539027112898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (781342603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390671303 + 390671304.

It is an arithmetic number, because the mean of its divisors is an integer number (390671304).

Almost surely, 2^781342607 is an apocalyptic number.

781342607 is a deficient number, since it is larger than the sum of its proper divisors (1).

781342607 is an equidigital number, since it uses as much as digits as its factorization.

781342607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 781342607 is about 27952.5062740356. The cubic root of 781342607 is about 921.0442643802.

The spelling of 781342607 in words is "seven hundred eighty-one million, three hundred forty-two thousand, six hundred seven".