1081896457 has 2 divisors, whose sum is σ = 1081896458. Its totient is φ = 1081896456.

The previous prime is 1081896449. The next prime is 1081896493. The reversal of 1081896457 is 7546981801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 573889936 + 508006521 = 23956^2 + 22539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081896457 - 2³ = 1081896449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1081896457.

It is not a weakly prime, because it can be changed into another prime (1081896407) 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, 540948228 + 540948229.

It is an arithmetic number, because the mean of its divisors is an integer number (540948229).

Almost surely, 2^1081896457 is an apocalyptic number.

It is an amenable number.

1081896457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081896457 is an equidigital number, since it uses as much as digits as its factorization.

1081896457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 1081896457 is about 32892.1944692050. The cubic root of 1081896457 is about 1026.5857531081.

The spelling of 1081896457 in words is "one billion, eighty-one million, eight hundred ninety-six thousand, four hundred fifty-seven".