386720749 has 2 divisors, whose sum is σ = 386720750. Its totient is φ = 386720748.

The previous prime is 386720693. The next prime is 386720767. The reversal of 386720749 is 947027683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359367849 + 27352900 = 18957^2 + 5230^2 .

It is a cyclic number.

It is not a de Polignac number, because 386720749 - 2²⁷ = 252503021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 386720699 and 386720708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386720549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193360374 + 193360375.

It is an arithmetic number, because the mean of its divisors is an integer number (193360375).

Almost surely, 2^386720749 is an apocalyptic number.

It is an amenable number.

386720749 is a deficient number, since it is larger than the sum of its proper divisors (1).

386720749 is an equidigital number, since it uses as much as digits as its factorization.

386720749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 386720749 is about 19665.2167290371. The cubic root of 386720749 is about 728.5608407443.

The spelling of 386720749 in words is "three hundred eighty-six million, seven hundred twenty thousand, seven hundred forty-nine".