78325441 has 2 divisors, whose sum is σ = 78325442. Its totient is φ = 78325440.

The previous prime is 78325417. The next prime is 78325447. The reversal of 78325441 is 14452387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73017025 + 5308416 = 8545^2 + 2304^2 .

It is an emirp because it is prime and its reverse (14452387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78325441 - 2⁹ = 78324929 is a prime.

It is a super-2 number, since 2×78325441² = 12269749415688962, which contains 22 as substring.

It is equal to p_4577407 and since 78325441 and 4577407 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 78325397 and 78325406.

It is not a weakly prime, because it can be changed into another prime (78325447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39162720 + 39162721.

It is an arithmetic number, because the mean of its divisors is an integer number (39162721).

Almost surely, 2^78325441 is an apocalyptic number.

It is an amenable number.

78325441 is a deficient number, since it is larger than the sum of its proper divisors (1).

78325441 is an equidigital number, since it uses as much as digits as its factorization.

78325441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

The square root of 78325441 is about 8850.1661566323. The cubic root of 78325441 is about 427.8592736895.

The spelling of 78325441 in words is "seventy-eight million, three hundred twenty-five thousand, four hundred forty-one".