378637541 has 2 divisors, whose sum is σ = 378637542. Its totient is φ = 378637540.

The previous prime is 378637537. The next prime is 378637547. The reversal of 378637541 is 145736873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374577316 + 4060225 = 19354^2 + 2015^2 .

It is an emirp because it is prime and its reverse (145736873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378637541 - 2² = 378637537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 378637492 and 378637501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378637547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189318770 + 189318771.

It is an arithmetic number, because the mean of its divisors is an integer number (189318771).

Almost surely, 2^378637541 is an apocalyptic number.

It is an amenable number.

378637541 is a deficient number, since it is larger than the sum of its proper divisors (1).

378637541 is an equidigital number, since it uses as much as digits as its factorization.

378637541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 44.

The square root of 378637541 is about 19458.6109730371. The cubic root of 378637541 is about 723.4489494782.

The spelling of 378637541 in words is "three hundred seventy-eight million, six hundred thirty-seven thousand, five hundred forty-one".