1081860449 has 2 divisors, whose sum is σ = 1081860450. Its totient is φ = 1081860448.

The previous prime is 1081860431. The next prime is 1081860463. The reversal of 1081860449 is 9440681801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609102400 + 472758049 = 24680^2 + 21743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081860449 - 2²⁴ = 1065083233 is a prime.

It is a super-2 number, since 2×1081860449² = 2340844062220963202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1081860419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540930224 + 540930225.

It is an arithmetic number, because the mean of its divisors is an integer number (540930225).

Almost surely, 2^1081860449 is an apocalyptic number.

It is an amenable number.

1081860449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081860449 is an equidigital number, since it uses as much as digits as its factorization.

1081860449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 1081860449 is about 32891.6471007458. The cubic root of 1081860449 is about 1026.5743639376.

The spelling of 1081860449 in words is "one billion, eighty-one million, eight hundred sixty thousand, four hundred forty-nine".