1981055467 has 2 divisors, whose sum is σ = 1981055468. Its totient is φ = 1981055466.

The previous prime is 1981055437. The next prime is 1981055473. The reversal of 1981055467 is 7645501891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1981055467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1981055437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990527733 + 990527734.

It is an arithmetic number, because the mean of its divisors is an integer number (990527734).

Almost surely, 2^1981055467 is an apocalyptic number.

1981055467 is a deficient number, since it is larger than the sum of its proper divisors (1).

1981055467 is an equidigital number, since it uses as much as digits as its factorization.

1981055467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 1981055467 is about 44509.0492709067. The cubic root of 1981055467 is about 1255.9303201756.

The spelling of 1981055467 in words is "one billion, nine hundred eighty-one million, fifty-five thousand, four hundred sixty-seven".