980056861 has 4 divisors (see below), whose sum is σ = 1120064992. Its totient is φ = 840048732.

The previous prime is 980056853. The next prime is 980056873. The reversal of 980056861 is 168650089.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 980056861 - 2³ = 980056853 is a prime.

It is a super-2 number, since 2×980056861² = 1921022901586346642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (980056801) 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, 70004055 + ... + 70004068.

It is an arithmetic number, because the mean of its divisors is an integer number (280016248).

Almost surely, 2^980056861 is an apocalyptic number.

It is an amenable number.

980056861 is a deficient number, since it is larger than the sum of its proper divisors (140008131).

980056861 is a wasteful number, since it uses less digits than its factorization.

980056861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140008130.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 980056861 is about 31305.8598508330. The cubic root of 980056861 is about 993.3075986782.

The spelling of 980056861 in words is "nine hundred eighty million, fifty-six thousand, eight hundred sixty-one".