774975612989 has 2 divisors, whose sum is σ = 774975612990. Its totient is φ = 774975612988.

The previous prime is 774975612967. The next prime is 774975613007. The reversal of 774975612989 is 989216579477.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645544757764 + 129430855225 = 803458^2 + 359765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-774975612989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (774975612959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387487806494 + 387487806495.

It is an arithmetic number, because the mean of its divisors is an integer number (387487806495).

Almost surely, 2^774975612989 is an apocalyptic number.

It is an amenable number.

774975612989 is a deficient number, since it is larger than the sum of its proper divisors (1).

774975612989 is an equidigital number, since it uses as much as digits as its factorization.

774975612989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480090240, while the sum is 74.

The spelling of 774975612989 in words is "seven hundred seventy-four billion, nine hundred seventy-five million, six hundred twelve thousand, nine hundred eighty-nine".