378780901 has 4 divisors (see below), whose sum is σ = 379279404. Its totient is φ = 378282400.

The previous prime is 378780889. The next prime is 378780907. The reversal of 378780901 is 109087873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84658401 + 294122500 = 9201^2 + 17150^2 .

It is a cyclic number.

It is not a de Polignac number, because 378780901 - 2¹⁷ = 378649829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378780907) 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 in 3 ways as a sum of consecutive naturals, for example, 248110 + ... + 249631.

It is an arithmetic number, because the mean of its divisors is an integer number (94819851).

Almost surely, 2^378780901 is an apocalyptic number.

It is an amenable number.

378780901 is a deficient number, since it is larger than the sum of its proper divisors (498503).

378780901 is an equidigital number, since it uses as much as digits as its factorization.

378780901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498502.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 378780901 is about 19462.2943405961. The cubic root of 378780901 is about 723.5402421997.

The spelling of 378780901 in words is "three hundred seventy-eight million, seven hundred eighty thousand, nine hundred one".