8047278739 has 2 divisors, whose sum is σ = 8047278740. Its totient is φ = 8047278738.

The previous prime is 8047278721. The next prime is 8047278749. The reversal of 8047278739 is 9378727408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8047278739 - 2⁷ = 8047278611 is a prime.

It is a super-2 number, since 2×8047278739² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8047278739.

It is not a weakly prime, because it can be changed into another prime (8047278719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4023639369 + 4023639370.

It is an arithmetic number, because the mean of its divisors is an integer number (4023639370).

Almost surely, 2^8047278739 is an apocalyptic number.

8047278739 is a deficient number, since it is larger than the sum of its proper divisors (1).

8047278739 is an equidigital number, since it uses as much as digits as its factorization.

8047278739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 55.

The square root of 8047278739 is about 89706.6259481428. The cubic root of 8047278739 is about 2003.9321589133.

The spelling of 8047278739 in words is "eight billion, forty-seven million, two hundred seventy-eight thousand, seven hundred thirty-nine".