82447237 has 2 divisors, whose sum is σ = 82447238. Its totient is φ = 82447236.

The previous prime is 82447231. The next prime is 82447241. The reversal of 82447237 is 73274428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63776196 + 18671041 = 7986^2 + 4321^2 .

It is a cyclic number.

It is not a de Polignac number, because 82447237 - 2⁷ = 82447109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82447196 and 82447205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82447231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41223618 + 41223619.

It is an arithmetic number, because the mean of its divisors is an integer number (41223619).

Almost surely, 2^82447237 is an apocalyptic number.

It is an amenable number.

82447237 is a deficient number, since it is larger than the sum of its proper divisors (1).

82447237 is an equidigital number, since it uses as much as digits as its factorization.

82447237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 37.

The square root of 82447237 is about 9080.0460901914. The cubic root of 82447237 is about 435.2365595779.

The spelling of 82447237 in words is "eighty-two million, four hundred forty-seven thousand, two hundred thirty-seven".