7899370261 has 4 divisors (see below), whose sum is σ = 7899600492. Its totient is φ = 7899140032.

The previous prime is 7899370243. The next prime is 7899370267. The reversal of 7899370261 is 1620739987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1620739987 = 659 ⋅2459393.

It can be written as a sum of positive squares in 2 ways, for example, as 6501358161 + 1398012100 = 80631^2 + 37390^2 .

It is a cyclic number.

It is not a de Polignac number, because 7899370261 - 2²³ = 7890981653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7899370199 and 7899370208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7899370267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52180 + ... + 136093.

It is an arithmetic number, because the mean of its divisors is an integer number (1974900123).

Almost surely, 2^7899370261 is an apocalyptic number.

It is an amenable number.

7899370261 is a deficient number, since it is larger than the sum of its proper divisors (230231).

7899370261 is a wasteful number, since it uses less digits than its factorization.

7899370261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230230.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 7899370261 is about 88878.4015439072. The cubic root of 7899370261 is about 1991.5787797083.

The spelling of 7899370261 in words is "seven billion, eight hundred ninety-nine million, three hundred seventy thousand, two hundred sixty-one".