7879000061 has 2 divisors, whose sum is σ = 7879000062. Its totient is φ = 7879000060.

The previous prime is 7879000057. The next prime is 7879000067. The reversal of 7879000061 is 1600009787.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4383234436 + 3495765625 = 66206^2 + 59125^2 .

It is an emirp because it is prime and its reverse (1600009787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7879000061 - 2² = 7879000057 is a prime.

It is a super-2 number, since 2×7879000061² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7878999979 and 7879000024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7879000067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939500030 + 3939500031.

It is an arithmetic number, because the mean of its divisors is an integer number (3939500031).

Almost surely, 2^7879000061 is an apocalyptic number.

It is an amenable number.

7879000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7879000061 is an equidigital number, since it uses as much as digits as its factorization.

7879000061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 7879000061 is about 88763.7316757244. The cubic root of 7879000061 is about 1989.8654034703.

The spelling of 7879000061 in words is "seven billion, eight hundred seventy-nine million, sixty-one", and thus it is an aban number.