78866453 has 2 divisors, whose sum is σ = 78866454. Its totient is φ = 78866452.

The previous prime is 78866441. The next prime is 78866461. The reversal of 78866453 is 35466887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76772644 + 2093809 = 8762^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 78866453 - 2¹⁰ = 78865429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78866398 and 78866407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78866413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39433226 + 39433227.

It is an arithmetic number, because the mean of its divisors is an integer number (39433227).

Almost surely, 2^78866453 is an apocalyptic number.

It is an amenable number.

78866453 is a deficient number, since it is larger than the sum of its proper divisors (1).

78866453 is an equidigital number, since it uses as much as digits as its factorization.

78866453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 78866453 is about 8880.6786339784. The cubic root of 78866453 is about 428.8421219997.

The spelling of 78866453 in words is "seventy-eight million, eight hundred sixty-six thousand, four hundred fifty-three".