77541481 has 2 divisors, whose sum is σ = 77541482. Its totient is φ = 77541480.

The previous prime is 77541479. The next prime is 77541523. The reversal of 77541481 is 18414577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77528025 + 13456 = 8805^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 77541481 - 2¹ = 77541479 is a prime.

It is a super-2 number, since 2×77541481² = 12025362551346722, which contains 22 as substring.

Together with 77541479, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77541481.

It is not a weakly prime, because it can be changed into another prime (77542481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38770740 + 38770741.

It is an arithmetic number, because the mean of its divisors is an integer number (38770741).

Almost surely, 2^77541481 is an apocalyptic number.

It is an amenable number.

77541481 is a deficient number, since it is larger than the sum of its proper divisors (1).

77541481 is an equidigital number, since it uses as much as digits as its factorization.

77541481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 37.

The square root of 77541481 is about 8805.7640781479. The cubic root of 77541481 is about 426.4270021075.

The spelling of 77541481 in words is "seventy-seven million, five hundred forty-one thousand, four hundred eighty-one".