787889045 has 6 divisors (see below), whose sum is σ = 945542178. Its totient is φ = 630261024.

The previous prime is 787889033. The next prime is 787889057. The reversal of 787889045 is 540988787.

It is an interprime number because it is at equal distance from previous prime (787889033) and next prime (787889057).

It can be written as a sum of positive squares in 3 ways, for example, as 595262404 + 192626641 = 24398^2 + 13879^2 .

It is not a de Polignac number, because 787889045 - 2¹² = 787884949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56489 + ... + 69041.

It is an arithmetic number, because the mean of its divisors is an integer number (157590363).

Almost surely, 2^787889045 is an apocalyptic number.

It is an amenable number.

787889045 is a deficient number, since it is larger than the sum of its proper divisors (157653133).

787889045 is an frugal number, since it uses more digits than its factorization.

787889045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25111 (or 12558 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 56.

The square root of 787889045 is about 28069.3613215549. The cubic root of 787889045 is about 923.6094206540.

The spelling of 787889045 in words is "seven hundred eighty-seven million, eight hundred eighty-nine thousand, forty-five".