378458749 has 2 divisors, whose sum is σ = 378458750. Its totient is φ = 378458748.

The previous prime is 378458723. The next prime is 378458753. The reversal of 378458749 is 947854873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265461849 + 112996900 = 16293^2 + 10630^2 .

It is a cyclic number.

It is not a de Polignac number, because 378458749 - 2¹⁵ = 378425981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 378458749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378450749) 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, 189229374 + 189229375.

It is an arithmetic number, because the mean of its divisors is an integer number (189229375).

Almost surely, 2^378458749 is an apocalyptic number.

It is an amenable number.

378458749 is a deficient number, since it is larger than the sum of its proper divisors (1).

378458749 is an equidigital number, since it uses as much as digits as its factorization.

378458749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 55.

The square root of 378458749 is about 19454.0162691409. The cubic root of 378458749 is about 723.3350610977.

The spelling of 378458749 in words is "three hundred seventy-eight million, four hundred fifty-eight thousand, seven hundred forty-nine".