77444141 has 2 divisors, whose sum is σ = 77444142. Its totient is φ = 77444140.

The previous prime is 77444137. The next prime is 77444153. The reversal of 77444141 is 14144477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55071241 + 22372900 = 7421^2 + 4730^2 .

It is an emirp because it is prime and its reverse (14144477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77444141 - 2² = 77444137 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77444098 and 77444107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77444131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38722070 + 38722071.

It is an arithmetic number, because the mean of its divisors is an integer number (38722071).

Almost surely, 2^77444141 is an apocalyptic number.

It is an amenable number.

77444141 is a deficient number, since it is larger than the sum of its proper divisors (1).

77444141 is an equidigital number, since it uses as much as digits as its factorization.

77444141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12544, while the sum is 32.

The square root of 77444141 is about 8800.2352809456. The cubic root of 77444141 is about 426.2484921244.

The spelling of 77444141 in words is "seventy-seven million, four hundred forty-four thousand, one hundred forty-one".