842491307461 has 2 divisors, whose sum is σ = 842491307462. Its totient is φ = 842491307460.

The previous prime is 842491307309. The next prime is 842491307501. The reversal of 842491307461 is 164703194248.

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., 802932484225 + 39558823236 = 896065^2 + 198894^2 .

It is a cyclic number.

It is not a de Polignac number, because 842491307461 - 2²³ = 842482918853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842491307761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421245653730 + 421245653731.

It is an arithmetic number, because the mean of its divisors is an integer number (421245653731).

Almost surely, 2^842491307461 is an apocalyptic number.

It is an amenable number.

842491307461 is a deficient number, since it is larger than the sum of its proper divisors (1).

842491307461 is an equidigital number, since it uses as much as digits as its factorization.

842491307461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 842491307461 in words is "eight hundred forty-two billion, four hundred ninety-one million, three hundred seven thousand, four hundred sixty-one".