763503661 has 2 divisors, whose sum is σ = 763503662. Its totient is φ = 763503660.

The previous prime is 763503617. The next prime is 763503667. The reversal of 763503661 is 166305367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529230025 + 234273636 = 23005^2 + 15306^2 .

It is an emirp because it is prime and its reverse (166305367) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 763503661 - 2²¹ = 761406509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 763503661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (763503667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381751830 + 381751831.

It is an arithmetic number, because the mean of its divisors is an integer number (381751831).

Almost surely, 2^763503661 is an apocalyptic number.

It is an amenable number.

763503661 is a deficient number, since it is larger than the sum of its proper divisors (1).

763503661 is an equidigital number, since it uses as much as digits as its factorization.

763503661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 763503661 is about 27631.5700060637. The cubic root of 763503661 is about 913.9807340799.

The spelling of 763503661 in words is "seven hundred sixty-three million, five hundred three thousand, six hundred sixty-one".