83445247 has 2 divisors, whose sum is σ = 83445248. Its totient is φ = 83445246.

The previous prime is 83445239. The next prime is 83445253. The reversal of 83445247 is 74254438.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83445247 - 2³ = 83445239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83445227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41722623 + 41722624.

It is an arithmetic number, because the mean of its divisors is an integer number (41722624).

Almost surely, 2^83445247 is an apocalyptic number.

83445247 is a deficient number, since it is larger than the sum of its proper divisors (1).

83445247 is an equidigital number, since it uses as much as digits as its factorization.

83445247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 37.

The square root of 83445247 is about 9134.8369990931. The cubic root of 83445247 is about 436.9856760888.

The spelling of 83445247 in words is "eighty-three million, four hundred forty-five thousand, two hundred forty-seven".