1040219989 has 2 divisors, whose sum is σ = 1040219990. Its totient is φ = 1040219988.

The previous prime is 1040219963. The next prime is 1040220019. The reversal of 1040219989 is 9899120401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667343889 + 372876100 = 25833^2 + 19310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040219989 - 2²¹ = 1038122837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040219959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520109994 + 520109995.

It is an arithmetic number, because the mean of its divisors is an integer number (520109995).

Almost surely, 2^1040219989 is an apocalyptic number.

It is an amenable number.

1040219989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040219989 is an equidigital number, since it uses as much as digits as its factorization.

1040219989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1040219989 is about 32252.4415974977. The cubic root of 1040219989 is about 1013.2308359389.

The spelling of 1040219989 in words is "one billion, forty million, two hundred nineteen thousand, nine hundred eighty-nine".