761421589 has 2 divisors, whose sum is σ = 761421590. Its totient is φ = 761421588.

The previous prime is 761421587. The next prime is 761421643. The reversal of 761421589 is 985124167.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417875364 + 343546225 = 20442^2 + 18535^2 .

It is a cyclic number.

It is not a de Polignac number, because 761421589 - 2¹ = 761421587 is a prime.

Together with 761421587, 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 (761421587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380710794 + 380710795.

It is an arithmetic number, because the mean of its divisors is an integer number (380710795).

Almost surely, 2^761421589 is an apocalyptic number.

It is an amenable number.

761421589 is a deficient number, since it is larger than the sum of its proper divisors (1).

761421589 is an equidigital number, since it uses as much as digits as its factorization.

761421589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 761421589 is about 27593.8686849090. The cubic root of 761421589 is about 913.1491702343.

The spelling of 761421589 in words is "seven hundred sixty-one million, four hundred twenty-one thousand, five hundred eighty-nine".