761489621 has 2 divisors, whose sum is σ = 761489622. Its totient is φ = 761489620.

The previous prime is 761489579. The next prime is 761489633. The reversal of 761489621 is 126984167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739296100 + 22193521 = 27190^2 + 4711^2 .

It is an emirp because it is prime and its reverse (126984167) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 761489621 - 2⁶ = 761489557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (761489671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380744810 + 380744811.

It is an arithmetic number, because the mean of its divisors is an integer number (380744811).

Almost surely, 2^761489621 is an apocalyptic number.

It is an amenable number.

761489621 is a deficient number, since it is larger than the sum of its proper divisors (1).

761489621 is an equidigital number, since it uses as much as digits as its factorization.

761489621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 761489621 is about 27595.1013949940. The cubic root of 761489621 is about 913.1763656431.

The spelling of 761489621 in words is "seven hundred sixty-one million, four hundred eighty-nine thousand, six hundred twenty-one".