388402793 has 2 divisors, whose sum is σ = 388402794. Its totient is φ = 388402792.

The previous prime is 388402747. The next prime is 388402849. The reversal of 388402793 is 397204883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227315929 + 161086864 = 15077^2 + 12692^2 .

It is a cyclic number.

It is not a de Polignac number, because 388402793 - 2⁸ = 388402537 is a prime.

It is a super-2 number, since 2×388402793² = 301713459220401698, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (388402093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194201396 + 194201397.

It is an arithmetic number, because the mean of its divisors is an integer number (194201397).

Almost surely, 2^388402793 is an apocalyptic number.

It is an amenable number.

388402793 is a deficient number, since it is larger than the sum of its proper divisors (1).

388402793 is an equidigital number, since it uses as much as digits as its factorization.

388402793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 388402793 is about 19707.9373096222. The cubic root of 388402793 is about 729.6156060958.

The spelling of 388402793 in words is "three hundred eighty-eight million, four hundred two thousand, seven hundred ninety-three".