84237649 has 2 divisors, whose sum is σ = 84237650. Its totient is φ = 84237648.

The previous prime is 84237611. The next prime is 84237667. The reversal of 84237649 is 94673248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49956624 + 34281025 = 7068^2 + 5855^2 .

It is a cyclic number.

It is not a de Polignac number, because 84237649 - 2¹⁷ = 84106577 is a prime.

It is not a weakly prime, because it can be changed into another prime (84207649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42118824 + 42118825.

It is an arithmetic number, because the mean of its divisors is an integer number (42118825).

Almost surely, 2^84237649 is an apocalyptic number.

It is an amenable number.

84237649 is a deficient number, since it is larger than the sum of its proper divisors (1).

84237649 is an equidigital number, since it uses as much as digits as its factorization.

84237649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 84237649 is about 9178.1070488418. The cubic root of 84237649 is about 438.3645363566.

The spelling of 84237649 in words is "eighty-four million, two hundred thirty-seven thousand, six hundred forty-nine".