378697561 has 8 divisors (see below), whose sum is σ = 420920064. Its totient is φ = 337774320.

The previous prime is 378697537. The next prime is 378697567. The reversal of 378697561 is 165796873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 378697561 - 2⁷ = 378697433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 378697499 and 378697508.

It is not an unprimeable number, because it can be changed into a prime (378697567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324201 + ... + 325366.

It is an arithmetic number, because the mean of its divisors is an integer number (52615008).

Almost surely, 2^378697561 is an apocalyptic number.

It is an amenable number.

378697561 is a deficient number, since it is larger than the sum of its proper divisors (42222503).

378697561 is a wasteful number, since it uses less digits than its factorization.

378697561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649631.

The product of its digits is 1905120, while the sum is 52.

The square root of 378697561 is about 19460.1531597262. The cubic root of 378697561 is about 723.4871734674.

The spelling of 378697561 in words is "three hundred seventy-eight million, six hundred ninety-seven thousand, five hundred sixty-one".