761561369 has 2 divisors, whose sum is σ = 761561370. Its totient is φ = 761561368.

The previous prime is 761561323. The next prime is 761561371. The reversal of 761561369 is 963165167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416976400 + 344584969 = 20420^2 + 18563^2 .

It is a cyclic number.

It is not a de Polignac number, because 761561369 - 2⁸ = 761561113 is a prime.

It is a super-2 number, since 2×761561369² = 1159951437506308322, which contains 22 as substring.

Together with 761561371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (761561389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380780684 + 380780685.

It is an arithmetic number, because the mean of its divisors is an integer number (380780685).

Almost surely, 2^761561369 is an apocalyptic number.

It is an amenable number.

761561369 is a deficient number, since it is larger than the sum of its proper divisors (1).

761561369 is an equidigital number, since it uses as much as digits as its factorization.

761561369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 44.

The square root of 761561369 is about 27596.4013777159. The cubic root of 761561369 is about 913.2050447472.

The spelling of 761561369 in words is "seven hundred sixty-one million, five hundred sixty-one thousand, three hundred sixty-nine".