980561819 has 4 divisors (see below), whose sum is σ = 1038241944. Its totient is φ = 922881696.

The previous prime is 980561789. The next prime is 980561839. The reversal of 980561819 is 918165089.

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 980561819 - 2⁸ = 980561563 is a prime.

It is a super-2 number, since 2×980561819² = 1923002961761177522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (980561839) 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, 28840037 + ... + 28840070.

It is an arithmetic number, because the mean of its divisors is an integer number (259560486).

Almost surely, 2^980561819 is an apocalyptic number.

980561819 is a deficient number, since it is larger than the sum of its proper divisors (57680125).

980561819 is a wasteful number, since it uses less digits than its factorization.

980561819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57680124.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 980561819 is about 31313.9237241199. The cubic root of 980561819 is about 993.4781644619.

The spelling of 980561819 in words is "nine hundred eighty million, five hundred sixty-one thousand, eight hundred nineteen".