761685643 has 2 divisors, whose sum is σ = 761685644. Its totient is φ = 761685642.

The previous prime is 761685637. The next prime is 761685671. The reversal of 761685643 is 346586167.

It is a weak prime.

It is an emirp because it is prime and its reverse (346586167) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 761685643 - 2⁹ = 761685131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 761685593 and 761685602.

It is not a weakly prime, because it can be changed into another prime (761685143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380842821 + 380842822.

It is an arithmetic number, because the mean of its divisors is an integer number (380842822).

Almost surely, 2^761685643 is an apocalyptic number.

761685643 is a deficient number, since it is larger than the sum of its proper divisors (1).

761685643 is an equidigital number, since it uses as much as digits as its factorization.

761685643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 46.

The square root of 761685643 is about 27598.6529200249. The cubic root of 761685643 is about 913.2547152775.

The spelling of 761685643 in words is "seven hundred sixty-one million, six hundred eighty-five thousand, six hundred forty-three".