761421539 has 2 divisors, whose sum is σ = 761421540. Its totient is φ = 761421538.

The previous prime is 761421487. The next prime is 761421541. The reversal of 761421539 is 935124167.

It is a strong prime.

It is an emirp because it is prime and its reverse (935124167) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 761421539 - 2¹⁶ = 761356003 is a prime.

It is a Sophie Germain prime.

Together with 761421541, 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 (761421589) 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, 380710769 + 380710770.

It is an arithmetic number, because the mean of its divisors is an integer number (380710770).

Almost surely, 2^761421539 is an apocalyptic number.

761421539 is a deficient number, since it is larger than the sum of its proper divisors (1).

761421539 is an equidigital number, since it uses as much as digits as its factorization.

761421539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 761421539 is about 27593.8677789106. The cubic root of 761421539 is about 913.1491502465.

The spelling of 761421539 in words is "seven hundred sixty-one million, four hundred twenty-one thousand, five hundred thirty-nine".