78332783 has 2 divisors, whose sum is σ = 78332784. Its totient is φ = 78332782.

The previous prime is 78332759. The next prime is 78332789. The reversal of 78332783 is 38723387.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78332783 is a prime.

It is a super-2 number, since 2×78332783² = 12272049785050178, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_4577783 and since 78332783 and 4577783 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78332783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78332789) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39166391 + 39166392.

It is an arithmetic number, because the mean of its divisors is an integer number (39166392).

Almost surely, 2^78332783 is an apocalyptic number.

78332783 is a deficient number, since it is larger than the sum of its proper divisors (1).

78332783 is an equidigital number, since it uses as much as digits as its factorization.

78332783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 78332783 is about 8850.5809413846. The cubic root of 78332783 is about 427.8726420348.

The spelling of 78332783 in words is "seventy-eight million, three hundred thirty-two thousand, seven hundred eighty-three".