388493761 has 2 divisors, whose sum is σ = 388493762. Its totient is φ = 388493760.

The previous prime is 388493719. The next prime is 388493771. The reversal of 388493761 is 167394883.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369831361 + 18662400 = 19231^2 + 4320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388493761 is a prime.

It is not a weakly prime, because it can be changed into another prime (388493771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194246880 + 194246881.

It is an arithmetic number, because the mean of its divisors is an integer number (194246881).

Almost surely, 2^388493761 is an apocalyptic number.

It is an amenable number.

388493761 is a deficient number, since it is larger than the sum of its proper divisors (1).

388493761 is an equidigital number, since it uses as much as digits as its factorization.

388493761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 388493761 is about 19710.2450771166. The cubic root of 388493761 is about 729.6725628536.

The spelling of 388493761 in words is "three hundred eighty-eight million, four hundred ninety-three thousand, seven hundred sixty-one".