980405771 has 2 divisors, whose sum is σ = 980405772. Its totient is φ = 980405770.

The previous prime is 980405747. The next prime is 980405779. The reversal of 980405771 is 177504089.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-980405771 is a prime.

It is a super-2 number, since 2×980405771² = 1922390951620208882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (980405779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490202885 + 490202886.

It is an arithmetic number, because the mean of its divisors is an integer number (490202886).

Almost surely, 2^980405771 is an apocalyptic number.

980405771 is a deficient number, since it is larger than the sum of its proper divisors (1).

980405771 is an equidigital number, since it uses as much as digits as its factorization.

980405771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 980405771 is about 31311.4319538408. The cubic root of 980405771 is about 993.4254604908.

The spelling of 980405771 in words is "nine hundred eighty million, four hundred five thousand, seven hundred seventy-one".