77072741 has 2 divisors, whose sum is σ = 77072742. Its totient is φ = 77072740.

The previous prime is 77072729. The next prime is 77072773. The reversal of 77072741 is 14727077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68973025 + 8099716 = 8305^2 + 2846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77072741 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77072791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38536370 + 38536371.

It is an arithmetic number, because the mean of its divisors is an integer number (38536371).

Almost surely, 2^77072741 is an apocalyptic number.

It is an amenable number.

77072741 is a deficient number, since it is larger than the sum of its proper divisors (1).

77072741 is an equidigital number, since it uses as much as digits as its factorization.

77072741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19208, while the sum is 35.

The square root of 77072741 is about 8779.1082121136. The cubic root of 77072741 is about 425.5660112545.

The spelling of 77072741 in words is "seventy-seven million, seventy-two thousand, seven hundred forty-one".