1040686849 has 2 divisors, whose sum is σ = 1040686850. Its totient is φ = 1040686848.

The previous prime is 1040686799. The next prime is 1040686861. The reversal of 1040686849 is 9486860401.

1040686849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 962240400 + 78446449 = 31020^2 + 8857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040686849 - 2¹³ = 1040678657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040686799 and 1040686808.

It is not a weakly prime, because it can be changed into another prime (1040686249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520343424 + 520343425.

It is an arithmetic number, because the mean of its divisors is an integer number (520343425).

Almost surely, 2^1040686849 is an apocalyptic number.

It is an amenable number.

1040686849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040686849 is an equidigital number, since it uses as much as digits as its factorization.

1040686849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 1040686849 is about 32259.6783771940. The cubic root of 1040686849 is about 1013.3823956100.

The spelling of 1040686849 in words is "one billion, forty million, six hundred eighty-six thousand, eight hundred forty-nine".