761650261 has 2 divisors, whose sum is σ = 761650262. Its totient is φ = 761650260.

The previous prime is 761650259. The next prime is 761650273. The reversal of 761650261 is 162056167.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404251236 + 357399025 = 20106^2 + 18905^2 .

It is a cyclic number.

It is not a de Polignac number, because 761650261 - 2¹ = 761650259 is a prime.

It is a super-2 number, since 2×761650261² = 1160222240162736242, which contains 22 as substring.

Together with 761650259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (761650061) 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, 380825130 + 380825131.

It is an arithmetic number, because the mean of its divisors is an integer number (380825131).

Almost surely, 2^761650261 is an apocalyptic number.

It is an amenable number.

761650261 is a deficient number, since it is larger than the sum of its proper divisors (1).

761650261 is an equidigital number, since it uses as much as digits as its factorization.

761650261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 761650261 is about 27598.0119030339. The cubic root of 761650261 is about 913.2405741512.

The spelling of 761650261 in words is "seven hundred sixty-one million, six hundred fifty thousand, two hundred sixty-one".