1161980431 has 2 divisors, whose sum is σ = 1161980432. Its totient is φ = 1161980430.

The previous prime is 1161980429. The next prime is 1161980461. The reversal of 1161980431 is 1340891611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161980431 - 2¹ = 1161980429 is a prime.

It is a super-2 number, since 2×1161980431² = 2700397044053891522, which contains 22 as substring.

Together with 1161980429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161980461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580990215 + 580990216.

It is an arithmetic number, because the mean of its divisors is an integer number (580990216).

Almost surely, 2^1161980431 is an apocalyptic number.

1161980431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161980431 is an equidigital number, since it uses as much as digits as its factorization.

1161980431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1161980431 is about 34087.8340614361. The cubic root of 1161980431 is about 1051.3151867330.

The spelling of 1161980431 in words is "one billion, one hundred sixty-one million, nine hundred eighty thousand, four hundred thirty-one".