84400187629 has 2 divisors, whose sum is σ = 84400187630. Its totient is φ = 84400187628.

The previous prime is 84400187621. The next prime is 84400187633. The reversal of 84400187629 is 92678100448.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62317633225 + 22082554404 = 249635^2 + 148602^2 .

It is a cyclic number.

It is not a de Polignac number, because 84400187629 - 2³ = 84400187621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84400187621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42200093814 + 42200093815.

It is an arithmetic number, because the mean of its divisors is an integer number (42200093815).

Almost surely, 2^84400187629 is an apocalyptic number.

It is an amenable number.

84400187629 is a deficient number, since it is larger than the sum of its proper divisors (1).

84400187629 is an equidigital number, since it uses as much as digits as its factorization.

84400187629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 84400187629 in words is "eighty-four billion, four hundred million, one hundred eighty-seven thousand, six hundred twenty-nine".