1040209673 has 2 divisors, whose sum is σ = 1040209674. Its totient is φ = 1040209672.

The previous prime is 1040209649. The next prime is 1040209691. The reversal of 1040209673 is 3769020401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841174009 + 199035664 = 29003^2 + 14108^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040209673 - 2⁶ = 1040209609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1040209693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520104836 + 520104837.

It is an arithmetic number, because the mean of its divisors is an integer number (520104837).

Almost surely, 2^1040209673 is an apocalyptic number.

It is an amenable number.

1040209673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040209673 is an equidigital number, since it uses as much as digits as its factorization.

1040209673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1040209673 is about 32252.2816712244. The cubic root of 1040209673 is about 1013.2274864795.

The spelling of 1040209673 in words is "one billion, forty million, two hundred nine thousand, six hundred seventy-three".