84400319 has 2 divisors, whose sum is σ = 84400320. Its totient is φ = 84400318.

The previous prime is 84400247. The next prime is 84400331. The reversal of 84400319 is 91300448.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84400319 is a prime.

It is a super-2 number, since 2×84400319² = 14246827694603522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84400291 and 84400300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84400399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42200159 + 42200160.

It is an arithmetic number, because the mean of its divisors is an integer number (42200160).

Almost surely, 2^84400319 is an apocalyptic number.

84400319 is a deficient number, since it is larger than the sum of its proper divisors (1).

84400319 is an equidigital number, since it uses as much as digits as its factorization.

84400319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 84400319 is about 9186.9646238570. The cubic root of 84400319 is about 438.6465278733.

The spelling of 84400319 in words is "eighty-four million, four hundred thousand, three hundred nineteen".