86780413 has 2 divisors, whose sum is σ = 86780414. Its totient is φ = 86780412.

The previous prime is 86780399. The next prime is 86780417. The reversal of 86780413 is 31408768.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52229529 + 34550884 = 7227^2 + 5878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86780413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86780417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43390206 + 43390207.

It is an arithmetic number, because the mean of its divisors is an integer number (43390207).

Almost surely, 2^86780413 is an apocalyptic number.

It is an amenable number.

86780413 is a deficient number, since it is larger than the sum of its proper divisors (1).

86780413 is an equidigital number, since it uses as much as digits as its factorization.

86780413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 86780413 is about 9315.6005174116. The cubic root of 86780413 is about 442.7316509748.

The spelling of 86780413 in words is "eighty-six million, seven hundred eighty thousand, four hundred thirteen".