761563261 has 2 divisors, whose sum is σ = 761563262. Its totient is φ = 761563260.

The previous prime is 761563219. The next prime is 761563273. The reversal of 761563261 is 162365167.

761563261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649944036 + 111619225 = 25494^2 + 10565^2 .

It is an emirp because it is prime and its reverse (162365167) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-761563261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 761563261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (761563211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380781630 + 380781631.

It is an arithmetic number, because the mean of its divisors is an integer number (380781631).

Almost surely, 2^761563261 is an apocalyptic number.

It is an amenable number.

761563261 is a deficient number, since it is larger than the sum of its proper divisors (1).

761563261 is an equidigital number, since it uses as much as digits as its factorization.

761563261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 761563261 is about 27596.4356575265. The cubic root of 761563261 is about 913.2058009929.

It can be divided in two parts, 7615 and 63261, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 761563261 in words is "seven hundred sixty-one million, five hundred sixty-three thousand, two hundred sixty-one".