980855191 has 2 divisors, whose sum is σ = 980855192. Its totient is φ = 980855190.

The previous prime is 980855179. The next prime is 980855251. The reversal of 980855191 is 191558089.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 980855191 - 2⁷ = 980855063 is a prime.

It is equal to p_49922848 and since 980855191 and 49922848 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (980855111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490427595 + 490427596.

It is an arithmetic number, because the mean of its divisors is an integer number (490427596).

Almost surely, 2^980855191 is an apocalyptic number.

980855191 is the 16741-st centered heptagonal number.

980855191 is a deficient number, since it is larger than the sum of its proper divisors (1).

980855191 is an equidigital number, since it uses as much as digits as its factorization.

980855191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 46.

The square root of 980855191 is about 31318.6077436402. The cubic root of 980855191 is about 993.5772333862.

The spelling of 980855191 in words is "nine hundred eighty million, eight hundred fifty-five thousand, one hundred ninety-one".