837342821261 has 2 divisors, whose sum is σ = 837342821262. Its totient is φ = 837342821260.

The previous prime is 837342821233. The next prime is 837342821267. The reversal of 837342821261 is 162128243738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726127241161 + 111215580100 = 852131^2 + 333490^2 .

It is a cyclic number.

It is not a de Polignac number, because 837342821261 - 2⁶ = 837342821197 is a prime.

It is a super-2 number, since 2×837342821261² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (837342821267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418671410630 + 418671410631.

It is an arithmetic number, because the mean of its divisors is an integer number (418671410631).

Almost surely, 2^837342821261 is an apocalyptic number.

It is an amenable number.

837342821261 is a deficient number, since it is larger than the sum of its proper divisors (1).

837342821261 is an equidigital number, since it uses as much as digits as its factorization.

837342821261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 47.

The spelling of 837342821261 in words is "eight hundred thirty-seven billion, three hundred forty-two million, eight hundred twenty-one thousand, two hundred sixty-one".