378726949 has 2 divisors, whose sum is σ = 378726950. Its totient is φ = 378726948.

The previous prime is 378726941. The next prime is 378726989. The reversal of 378726949 is 949627873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378574849 + 152100 = 19457^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 378726949 - 2³ = 378726941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 378726949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378726941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189363474 + 189363475.

It is an arithmetic number, because the mean of its divisors is an integer number (189363475).

Almost surely, 2^378726949 is an apocalyptic number.

It is an amenable number.

378726949 is a deficient number, since it is larger than the sum of its proper divisors (1).

378726949 is an equidigital number, since it uses as much as digits as its factorization.

378726949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 55.

The square root of 378726949 is about 19460.9082264934. The cubic root of 378726949 is about 723.5058878658.

The spelling of 378726949 in words is "three hundred seventy-eight million, seven hundred twenty-six thousand, nine hundred forty-nine".