78412751 has 2 divisors, whose sum is σ = 78412752. Its totient is φ = 78412750.

The previous prime is 78412717. The next prime is 78412757. The reversal of 78412751 is 15721487.

It is a strong prime.

It is an emirp because it is prime and its reverse (15721487) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78412751 is a prime.

It is a super-2 number, since 2×78412751² = 12297119038776002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78412757) 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 as a sum of consecutive naturals, namely, 39206375 + 39206376.

It is an arithmetic number, because the mean of its divisors is an integer number (39206376).

Almost surely, 2^78412751 is an apocalyptic number.

78412751 is a deficient number, since it is larger than the sum of its proper divisors (1).

78412751 is an equidigital number, since it uses as much as digits as its factorization.

78412751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15680, while the sum is 35.

The square root of 78412751 is about 8855.0974585264. The cubic root of 78412751 is about 428.0181940471.

The spelling of 78412751 in words is "seventy-eight million, four hundred twelve thousand, seven hundred fifty-one".