378625549 has 2 divisors, whose sum is σ = 378625550. Its totient is φ = 378625548.

The previous prime is 378625543. The next prime is 378625553. The reversal of 378625549 is 945526873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272844324 + 105781225 = 16518^2 + 10285^2 .

It is a cyclic number.

It is not a de Polignac number, because 378625549 - 2²³ = 370236941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378625543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189312774 + 189312775.

It is an arithmetic number, because the mean of its divisors is an integer number (189312775).

Almost surely, 2^378625549 is an apocalyptic number.

It is an amenable number.

378625549 is a deficient number, since it is larger than the sum of its proper divisors (1).

378625549 is an equidigital number, since it uses as much as digits as its factorization.

378625549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 49.

The square root of 378625549 is about 19458.3028293837. The cubic root of 378625549 is about 723.4413118384.

The spelling of 378625549 in words is "three hundred seventy-eight million, six hundred twenty-five thousand, five hundred forty-nine".