77612141 has 2 divisors, whose sum is σ = 77612142. Its totient is φ = 77612140.

The previous prime is 77612083. The next prime is 77612153. The reversal of 77612141 is 14121677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46854025 + 30758116 = 6845^2 + 5546^2 .

It is an emirp because it is prime and its reverse (14121677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77612141 - 2¹⁰ = 77611117 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 (77602141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38806070 + 38806071.

It is an arithmetic number, because the mean of its divisors is an integer number (38806071).

Almost surely, 2^77612141 is an apocalyptic number.

It is an amenable number.

77612141 is a deficient number, since it is larger than the sum of its proper divisors (1).

77612141 is an equidigital number, since it uses as much as digits as its factorization.

77612141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 29.

The square root of 77612141 is about 8809.7753092800. The cubic root of 77612141 is about 426.5564905816.

The spelling of 77612141 in words is "seventy-seven million, six hundred twelve thousand, one hundred forty-one".