84957919 has 2 divisors, whose sum is σ = 84957920. Its totient is φ = 84957918.

The previous prime is 84957913. The next prime is 84957923. The reversal of 84957919 is 91975948.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84957919 - 2¹⁹ = 84433631 is a prime.

It is a super-2 number, since 2×84957919² = 14435696001621122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84957913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42478959 + 42478960.

It is an arithmetic number, because the mean of its divisors is an integer number (42478960).

Almost surely, 2^84957919 is an apocalyptic number.

84957919 is a deficient number, since it is larger than the sum of its proper divisors (1).

84957919 is an equidigital number, since it uses as much as digits as its factorization.

84957919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 84957919 is about 9217.2620121162. The cubic root of 84957919 is about 439.6103972037.

The spelling of 84957919 in words is "eighty-four million, nine hundred fifty-seven thousand, nine hundred nineteen".