761991481 has 2 divisors, whose sum is σ = 761991482. Its totient is φ = 761991480.

The previous prime is 761991479. The next prime is 761991521. The reversal of 761991481 is 184199167.

761991481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395651881 + 366339600 = 19891^2 + 19140^2 .

It is a cyclic number.

It is not a de Polignac number, because 761991481 - 2¹ = 761991479 is a prime.

It is a super-2 number, since 2×761991481² = 1161262034233146722, which contains 22 as substring.

Together with 761991479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (761991421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380995740 + 380995741.

It is an arithmetic number, because the mean of its divisors is an integer number (380995741).

Almost surely, 2^761991481 is an apocalyptic number.

It is an amenable number.

761991481 is a deficient number, since it is larger than the sum of its proper divisors (1).

761991481 is an equidigital number, since it uses as much as digits as its factorization.

761991481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 46.

The square root of 761991481 is about 27604.1931778489. The cubic root of 761991481 is about 913.3769313226.

The spelling of 761991481 in words is "seven hundred sixty-one million, nine hundred ninety-one thousand, four hundred eighty-one".