78594449 has 2 divisors, whose sum is σ = 78594450. Its totient is φ = 78594448.

The previous prime is 78594407. The next prime is 78594479. The reversal of 78594449 is 94449587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42510400 + 36084049 = 6520^2 + 6007^2 .

It is a cyclic number.

It is not a de Polignac number, because 78594449 - 2¹² = 78590353 is a prime.

It is a super-2 number, since 2×78594449² = 12354174827227202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78594397 and 78594406.

It is not a weakly prime, because it can be changed into another prime (78594479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39297224 + 39297225.

It is an arithmetic number, because the mean of its divisors is an integer number (39297225).

Almost surely, 2^78594449 is an apocalyptic number.

It is an amenable number.

78594449 is a deficient number, since it is larger than the sum of its proper divisors (1).

78594449 is an equidigital number, since it uses as much as digits as its factorization.

78594449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 78594449 is about 8865.3510364790. The cubic root of 78594449 is about 428.3485402236.

The spelling of 78594449 in words is "seventy-eight million, five hundred ninety-four thousand, four hundred forty-nine".