77956141 has 2 divisors, whose sum is σ = 77956142. Its totient is φ = 77956140.

The previous prime is 77956139. The next prime is 77956159. The reversal of 77956141 is 14165977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77951241 + 4900 = 8829^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 77956141 - 2¹ = 77956139 is a prime.

It is a super-2 number, since 2×77956141² = 12154319839223762, which contains 22 as substring.

Together with 77956139, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 77956094 and 77956103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77956121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38978070 + 38978071.

It is an arithmetic number, because the mean of its divisors is an integer number (38978071).

Almost surely, 2^77956141 is an apocalyptic number.

It is an amenable number.

77956141 is a deficient number, since it is larger than the sum of its proper divisors (1).

77956141 is an equidigital number, since it uses as much as digits as its factorization.

77956141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 77956141 is about 8829.2774902593. The cubic root of 77956141 is about 427.1857700195.

The spelling of 77956141 in words is "seventy-seven million, nine hundred fifty-six thousand, one hundred forty-one".