3890981567 has 4 divisors (see below), whose sum is σ = 4244707176. Its totient is φ = 3537255960.

The previous prime is 3890981543. The next prime is 3890981587. The reversal of 3890981567 is 7651890983.

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

It is a cyclic number.

It is not a de Polignac number, because 3890981567 - 2⁶ = 3890981503 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 (3890981537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176862788 + ... + 176862809.

It is an arithmetic number, because the mean of its divisors is an integer number (1061176794).

Almost surely, 2^3890981567 is an apocalyptic number.

3890981567 is a deficient number, since it is larger than the sum of its proper divisors (353725609).

3890981567 is a wasteful number, since it uses less digits than its factorization.

3890981567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353725608.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The square root of 3890981567 is about 62377.7329421325. The cubic root of 3890981567 is about 1572.8466842364.

The spelling of 3890981567 in words is "three billion, eight hundred ninety million, nine hundred eighty-one thousand, five hundred sixty-seven".