78763005 has 12 divisors (see below), whose sum is σ = 136522620. Its totient is φ = 42006912.

The previous prime is 78763001. The next prime is 78763019. The reversal of 78763005 is 50036787.

It can be written as a sum of positive squares in 2 ways, for example, as 27311076 + 51451929 = 5226^2 + 7173^2 .

It is not a de Polignac number, because 78763005 - 2² = 78763001 is a prime.

It is a super-2 number, since 2×78763005² = 12407221913260050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78763001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 875100 + ... + 875189.

It is an arithmetic number, because the mean of its divisors is an integer number (11376885).

Almost surely, 2^78763005 is an apocalyptic number.

It is an amenable number.

78763005 is a deficient number, since it is larger than the sum of its proper divisors (57759615).

78763005 is a wasteful number, since it uses less digits than its factorization.

78763005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750300 (or 1750297 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 78763005 is about 8874.8523931387. The cubic root of 78763005 is about 428.6545379299.

The spelling of 78763005 in words is "seventy-eight million, seven hundred sixty-three thousand, five".