84009734261 has 2 divisors, whose sum is σ = 84009734262. Its totient is φ = 84009734260.

The previous prime is 84009734257. The next prime is 84009734321. The reversal of 84009734261 is 16243790048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45860222500 + 38149511761 = 214150^2 + 195319^2 .

It is a cyclic number.

It is not a de Polignac number, because 84009734261 - 2² = 84009734257 is a prime.

It is a super-2 number, since 2×84009734261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84009734201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42004867130 + 42004867131.

It is an arithmetic number, because the mean of its divisors is an integer number (42004867131).

Almost surely, 2^84009734261 is an apocalyptic number.

It is an amenable number.

84009734261 is a deficient number, since it is larger than the sum of its proper divisors (1).

84009734261 is an equidigital number, since it uses as much as digits as its factorization.

84009734261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 84009734261 in words is "eighty-four billion, nine million, seven hundred thirty-four thousand, two hundred sixty-one".