7898061877 has 2 divisors, whose sum is σ = 7898061878. Its totient is φ = 7898061876.

The previous prime is 7898061833. The next prime is 7898061947. The reversal of 7898061877 is 7781608987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6462712881 + 1435348996 = 80391^2 + 37886^2 .

It is a cyclic number.

It is not a de Polignac number, because 7898061877 - 2¹⁹ = 7897537589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7898061817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3949030938 + 3949030939.

It is an arithmetic number, because the mean of its divisors is an integer number (3949030939).

Almost surely, 2^7898061877 is an apocalyptic number.

It is an amenable number.

7898061877 is a deficient number, since it is larger than the sum of its proper divisors (1).

7898061877 is an equidigital number, since it uses as much as digits as its factorization.

7898061877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9483264, while the sum is 61.

The square root of 7898061877 is about 88871.0407106837. The cubic root of 7898061877 is about 1991.4688176227.

The spelling of 7898061877 in words is "seven billion, eight hundred ninety-eight million, sixty-one thousand, eight hundred seventy-seven".