83420047 has 2 divisors, whose sum is σ = 83420048. Its totient is φ = 83420046.

The previous prime is 83420023. The next prime is 83420087. The reversal of 83420047 is 74002438.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83420047 - 2¹⁵ = 83387279 is a prime.

It is a super-3 number, since 3×83420047³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 83419997 and 83420024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83420017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41710023 + 41710024.

It is an arithmetic number, because the mean of its divisors is an integer number (41710024).

Almost surely, 2^83420047 is an apocalyptic number.

83420047 is a deficient number, since it is larger than the sum of its proper divisors (1).

83420047 is an equidigital number, since it uses as much as digits as its factorization.

83420047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 83420047 is about 9133.4575599824. The cubic root of 83420047 is about 436.9416825795.

The spelling of 83420047 in words is "eighty-three million, four hundred twenty thousand, forty-seven".