77305693 has 2 divisors, whose sum is σ = 77305694. Its totient is φ = 77305692.

The previous prime is 77305649. The next prime is 77305717. The reversal of 77305693 is 39650377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76790169 + 515524 = 8763^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 77305693 - 2¹³ = 77297501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77305603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38652846 + 38652847.

It is an arithmetic number, because the mean of its divisors is an integer number (38652847).

Almost surely, 2^77305693 is an apocalyptic number.

It is an amenable number.

77305693 is a deficient number, since it is larger than the sum of its proper divisors (1).

77305693 is an equidigital number, since it uses as much as digits as its factorization.

77305693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070, while the sum is 40.

The square root of 77305693 is about 8792.3656088677. The cubic root of 77305693 is about 425.9943371006.

The spelling of 77305693 in words is "seventy-seven million, three hundred five thousand, six hundred ninety-three".