84427872401 has 2 divisors, whose sum is σ = 84427872402. Its totient is φ = 84427872400.

The previous prime is 84427872377. The next prime is 84427872409. The reversal of 84427872401 is 10427872448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50654254225 + 33773618176 = 225065^2 + 183776^2 .

It is a cyclic number.

It is not a de Polignac number, because 84427872401 - 2²⁶ = 84360763537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84427872409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42213936200 + 42213936201.

It is an arithmetic number, because the mean of its divisors is an integer number (42213936201).

Almost surely, 2^84427872401 is an apocalyptic number.

It is an amenable number.

84427872401 is a deficient number, since it is larger than the sum of its proper divisors (1).

84427872401 is an equidigital number, since it uses as much as digits as its factorization.

84427872401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 802816, while the sum is 47.

Adding to 84427872401 its sum of digits (47), we get a palindrome (84427872448).

The spelling of 84427872401 in words is "eighty-four billion, four hundred twenty-seven million, eight hundred seventy-two thousand, four hundred one".