378247553 has 2 divisors, whose sum is σ = 378247554. Its totient is φ = 378247552.

The previous prime is 378247537. The next prime is 378247577. The reversal of 378247553 is 355742873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377019889 + 1227664 = 19417^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 378247553 - 2⁴ = 378247537 is a prime.

It is a super-2 number, since 2×378247553² = 286142422700975618, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (378247453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189123776 + 189123777.

It is an arithmetic number, because the mean of its divisors is an integer number (189123777).

Almost surely, 2^378247553 is an apocalyptic number.

It is an amenable number.

378247553 is a deficient number, since it is larger than the sum of its proper divisors (1).

378247553 is an equidigital number, since it uses as much as digits as its factorization.

378247553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 44.

The square root of 378247553 is about 19448.5874294253. The cubic root of 378247553 is about 723.2004855353.

The spelling of 378247553 in words is "three hundred seventy-eight million, two hundred forty-seven thousand, five hundred fifty-three".