78764327 has 2 divisors, whose sum is σ = 78764328. Its totient is φ = 78764326.

The previous prime is 78764297. The next prime is 78764341. The reversal of 78764327 is 72346787.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78764327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78364327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39382163 + 39382164.

It is an arithmetic number, because the mean of its divisors is an integer number (39382164).

Almost surely, 2^78764327 is an apocalyptic number.

78764327 is a deficient number, since it is larger than the sum of its proper divisors (1).

78764327 is an equidigital number, since it uses as much as digits as its factorization.

78764327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 44.

The square root of 78764327 is about 8874.9268729382. The cubic root of 78764327 is about 428.6569361714.

The spelling of 78764327 in words is "seventy-eight million, seven hundred sixty-four thousand, three hundred twenty-seven".