77283161 has 2 divisors, whose sum is σ = 77283162. Its totient is φ = 77283160.

The previous prime is 77283109. The next prime is 77283163. The reversal of 77283161 is 16138277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75151561 + 2131600 = 8669^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 77283161 - 2¹⁸ = 77021017 is a prime.

It is a Sophie Germain prime.

Together with 77283163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (77283163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38641580 + 38641581.

It is an arithmetic number, because the mean of its divisors is an integer number (38641581).

Almost surely, 2^77283161 is an apocalyptic number.

It is an amenable number.

77283161 is a deficient number, since it is larger than the sum of its proper divisors (1).

77283161 is an equidigital number, since it uses as much as digits as its factorization.

77283161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 77283161 is about 8791.0841765962. The cubic root of 77283161 is about 425.9529454224.

The spelling of 77283161 in words is "seventy-seven million, two hundred eighty-three thousand, one hundred sixty-one".