78304799 has 2 divisors, whose sum is σ = 78304800. Its totient is φ = 78304798.

The previous prime is 78304789. The next prime is 78304813. The reversal of 78304799 is 99740387.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78304799 - 2⁴ = 78304783 is a prime.

It is a super-2 number, since 2×78304799² = 12263283092860802, 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 (78304739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39152399 + 39152400.

It is an arithmetic number, because the mean of its divisors is an integer number (39152400).

Almost surely, 2^78304799 is an apocalyptic number.

78304799 is a deficient number, since it is larger than the sum of its proper divisors (1).

78304799 is an equidigital number, since it uses as much as digits as its factorization.

78304799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 78304799 is about 8848.9998869929. Note that the first 3 decimals coincide. The cubic root of 78304799 is about 427.8216841699.

The spelling of 78304799 in words is "seventy-eight million, three hundred four thousand, seven hundred ninety-nine".