378675987 has 4 divisors (see below), whose sum is σ = 504901320. Its totient is φ = 252450656.

The previous prime is 378675977. The next prime is 378675989. The reversal of 378675987 is 789576873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789576873 = 3 ⋅263192291.

It is a cyclic number.

It is not a de Polignac number, because 378675987 - 2⁶ = 378675923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 378675987.

It is not an unprimeable number, because it can be changed into a prime (378675989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63112662 + ... + 63112667.

It is an arithmetic number, because the mean of its divisors is an integer number (126225330).

Almost surely, 2^378675987 is an apocalyptic number.

378675987 is a deficient number, since it is larger than the sum of its proper divisors (126225333).

378675987 is a wasteful number, since it uses less digits than its factorization.

378675987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126225332.

The product of its digits is 17781120, while the sum is 60.

The square root of 378675987 is about 19459.5988396472. The cubic root of 378675987 is about 723.4734344398.

It can be divided in two parts, 3786 and 75987, that multiplied together give a palindrome (287686782).

The spelling of 378675987 in words is "three hundred seventy-eight million, six hundred seventy-five thousand, nine hundred eighty-seven".