77654461 has 2 divisors, whose sum is σ = 77654462. Its totient is φ = 77654460.

The previous prime is 77654449. The next prime is 77654483. The reversal of 77654461 is 16445677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63920025 + 13734436 = 7995^2 + 3706^2 .

It is an emirp because it is prime and its reverse (16445677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77654461 - 2⁵ = 77654429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77654441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38827230 + 38827231.

It is an arithmetic number, because the mean of its divisors is an integer number (38827231).

Almost surely, 2^77654461 is an apocalyptic number.

It is an amenable number.

77654461 is a deficient number, since it is larger than the sum of its proper divisors (1).

77654461 is an equidigital number, since it uses as much as digits as its factorization.

77654461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 77654461 is about 8812.1768593237. The cubic root of 77654461 is about 426.6340067638.

The spelling of 77654461 in words is "seventy-seven million, six hundred fifty-four thousand, four hundred sixty-one".