77331461 has 2 divisors, whose sum is σ = 77331462. Its totient is φ = 77331460.

The previous prime is 77331427. The next prime is 77331491. The reversal of 77331461 is 16413377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77176225 + 155236 = 8785^2 + 394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77331461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77331421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38665730 + 38665731.

It is an arithmetic number, because the mean of its divisors is an integer number (38665731).

Almost surely, 2^77331461 is an apocalyptic number.

It is an amenable number.

77331461 is a deficient number, since it is larger than the sum of its proper divisors (1).

77331461 is an equidigital number, since it uses as much as digits as its factorization.

77331461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 32.

The square root of 77331461 is about 8793.8308489531. The cubic root of 77331461 is about 426.0416635102.

The spelling of 77331461 in words is "seventy-seven million, three hundred thirty-one thousand, four hundred sixty-one".