84623257 has 2 divisors, whose sum is σ = 84623258. Its totient is φ = 84623256.

The previous prime is 84623251. The next prime is 84623261. The reversal of 84623257 is 75232648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72658576 + 11964681 = 8524^2 + 3459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84623257 is a prime.

It is a super-2 number, since 2×84623257² = 14322191250576098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84623251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42311628 + 42311629.

It is an arithmetic number, because the mean of its divisors is an integer number (42311629).

Almost surely, 2^84623257 is an apocalyptic number.

It is an amenable number.

84623257 is a deficient number, since it is larger than the sum of its proper divisors (1).

84623257 is an equidigital number, since it uses as much as digits as its factorization.

84623257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 84623257 is about 9199.0900093433. The cubic root of 84623257 is about 439.0324071530.

The spelling of 84623257 in words is "eighty-four million, six hundred twenty-three thousand, two hundred fifty-seven".