7806401249 has 2 divisors, whose sum is σ = 7806401250. Its totient is φ = 7806401248.

The previous prime is 7806401243. The next prime is 7806401287. The reversal of 7806401249 is 9421046087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4505094400 + 3301306849 = 67120^2 + 57457^2 .

It is an emirp because it is prime and its reverse (9421046087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7806401249 - 2⁴ = 7806401233 is a prime.

It is not a weakly prime, because it can be changed into another prime (7806401243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3903200624 + 3903200625.

It is an arithmetic number, because the mean of its divisors is an integer number (3903200625).

Almost surely, 2^7806401249 is an apocalyptic number.

It is an amenable number.

7806401249 is a deficient number, since it is larger than the sum of its proper divisors (1).

7806401249 is an equidigital number, since it uses as much as digits as its factorization.

7806401249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 7806401249 is about 88353.8411672068. The cubic root of 7806401249 is about 1983.7348518128.

The spelling of 7806401249 in words is "seven billion, eight hundred six million, four hundred one thousand, two hundred forty-nine".