7871079409 has 2 divisors, whose sum is σ = 7871079410. Its totient is φ = 7871079408.

The previous prime is 7871079361. The next prime is 7871079431. The reversal of 7871079409 is 9049701787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7859709025 + 11370384 = 88655^2 + 3372^2 .

It is a cyclic number.

It is not a de Polignac number, because 7871079409 - 2¹³ = 7871071217 is a prime.

It is not a weakly prime, because it can be changed into another prime (7871079499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3935539704 + 3935539705.

It is an arithmetic number, because the mean of its divisors is an integer number (3935539705).

Almost surely, 2^7871079409 is an apocalyptic number.

It is an amenable number.

7871079409 is a deficient number, since it is larger than the sum of its proper divisors (1).

7871079409 is an equidigital number, since it uses as much as digits as its factorization.

7871079409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 52.

The square root of 7871079409 is about 88719.1039686493. The cubic root of 7871079409 is about 1989.1983849964.

The spelling of 7871079409 in words is "seven billion, eight hundred seventy-one million, seventy-nine thousand, four hundred nine".