980188813 has 2 divisors, whose sum is σ = 980188814. Its totient is φ = 980188812.

The previous prime is 980188799. The next prime is 980188823. The reversal of 980188813 is 318881089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 709849449 + 270339364 = 26643^2 + 16442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-980188813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (980188823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490094406 + 490094407.

It is an arithmetic number, because the mean of its divisors is an integer number (490094407).

Almost surely, 2^980188813 is an apocalyptic number.

It is an amenable number.

980188813 is a deficient number, since it is larger than the sum of its proper divisors (1).

980188813 is an equidigital number, since it uses as much as digits as its factorization.

980188813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 46.

The square root of 980188813 is about 31307.9672447765. The cubic root of 980188813 is about 993.3521753579.

The spelling of 980188813 in words is "nine hundred eighty million, one hundred eighty-eight thousand, eight hundred thirteen".