2427760721 has 2 divisors, whose sum is σ = 2427760722. Its totient is φ = 2427760720.

The previous prime is 2427760681. The next prime is 2427760729. The reversal of 2427760721 is 1270677242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2426941696 + 819025 = 49264^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 2427760721 - 2¹⁴ = 2427744337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2427760729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1213880360 + 1213880361.

It is an arithmetic number, because the mean of its divisors is an integer number (1213880361).

Almost surely, 2^2427760721 is an apocalyptic number.

It is an amenable number.

2427760721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2427760721 is an equidigital number, since it uses as much as digits as its factorization.

2427760721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 2427760721 is about 49272.3119104432. The cubic root of 2427760721 is about 1344.0083293327.

The spelling of 2427760721 in words is "two billion, four hundred twenty-seven million, seven hundred sixty thousand, seven hundred twenty-one".