77497393 has 2 divisors, whose sum is σ = 77497394. Its totient is φ = 77497392.

The previous prime is 77497363. The next prime is 77497397. The reversal of 77497393 is 39379477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49322529 + 28174864 = 7023^2 + 5308^2 .

It is a cyclic number.

It is not a de Polignac number, because 77497393 - 2¹⁷ = 77366321 is a prime.

It is not a weakly prime, because it can be changed into another prime (77497397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38748696 + 38748697.

It is an arithmetic number, because the mean of its divisors is an integer number (38748697).

Almost surely, 2^77497393 is an apocalyptic number.

It is an amenable number.

77497393 is a deficient number, since it is larger than the sum of its proper divisors (1).

77497393 is an equidigital number, since it uses as much as digits as its factorization.

77497393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000188, while the sum is 49.

The square root of 77497393 is about 8803.2603619341. The cubic root of 77497393 is about 426.3461684785.

The spelling of 77497393 in words is "seventy-seven million, four hundred ninety-seven thousand, three hundred ninety-three".