2389779695477 has 2 divisors, whose sum is σ = 2389779695478. Its totient is φ = 2389779695476.

The previous prime is 2389779695419. The next prime is 2389779695491. The reversal of 2389779695477 is 7745969779832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2037330877201 + 352448818276 = 1427351^2 + 593674^2 .

It is a cyclic number.

It is not a de Polignac number, because 2389779695477 - 2²⁴ = 2389762918261 is a prime.

It is a super-2 number, since 2×2389779695477² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2389779695395 and 2389779695404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2389779695777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194889847738 + 1194889847739.

It is an arithmetic number, because the mean of its divisors is an integer number (1194889847739).

Almost surely, 2^{2389779695477} is an apocalyptic number.

It is an amenable number.

2389779695477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2389779695477 is an equidigital number, since it uses as much as digits as its factorization.

2389779695477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10081895040, while the sum is 83.

The spelling of 2389779695477 in words is "two trillion, three hundred eighty-nine billion, seven hundred seventy-nine million, six hundred ninety-five thousand, four hundred seventy-seven".