2461939721 has 2 divisors, whose sum is σ = 2461939722. Its totient is φ = 2461939720.

The previous prime is 2461939693. The next prime is 2461939811. The reversal of 2461939721 is 1279391642.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2021401600 + 440538121 = 44960^2 + 20989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2461939721 - 2¹⁴ = 2461923337 is a prime.

It is a super-2 number, since 2×2461939721² = 12122294379675115682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2461930721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1230969860 + 1230969861.

It is an arithmetic number, because the mean of its divisors is an integer number (1230969861).

Almost surely, 2^2461939721 is an apocalyptic number.

It is an amenable number.

2461939721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2461939721 is an equidigital number, since it uses as much as digits as its factorization.

2461939721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 2461939721 is about 49617.9374924029. The cubic root of 2461939721 is about 1350.2861251784.

The spelling of 2461939721 in words is "two billion, four hundred sixty-one million, nine hundred thirty-nine thousand, seven hundred twenty-one".