388744949 has 2 divisors, whose sum is σ = 388744950. Its totient is φ = 388744948.

The previous prime is 388744927. The next prime is 388744981. The reversal of 388744949 is 949447883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268140625 + 120604324 = 16375^2 + 10982^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388744949 is a prime.

It is a super-2 number, since 2×388744949² = 302245270746025202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 388744894 and 388744903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388746949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194372474 + 194372475.

It is an arithmetic number, because the mean of its divisors is an integer number (194372475).

Almost surely, 2^388744949 is an apocalyptic number.

It is an amenable number.

388744949 is a deficient number, since it is larger than the sum of its proper divisors (1).

388744949 is an equidigital number, since it uses as much as digits as its factorization.

388744949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 56.

The square root of 388744949 is about 19716.6160636150. The cubic root of 388744949 is about 729.8297901780.

The spelling of 388744949 in words is "three hundred eighty-eight million, seven hundred forty-four thousand, nine hundred forty-nine".