617131380269 has 2 divisors, whose sum is σ = 617131380270. Its totient is φ = 617131380268.

The previous prime is 617131380263. The next prime is 617131380331. The reversal of 617131380269 is 962083131716.

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., 615965977225 + 1165403044 = 784835^2 + 34138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617131380269 is a prime.

It is a super-2 number, since 2×617131380269² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617131380263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308565690134 + 308565690135.

It is an arithmetic number, because the mean of its divisors is an integer number (308565690135).

Almost surely, 2^617131380269 is an apocalyptic number.

It is an amenable number.

617131380269 is a deficient number, since it is larger than the sum of its proper divisors (1).

617131380269 is an equidigital number, since it uses as much as digits as its factorization.

617131380269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 617131380269 in words is "six hundred seventeen billion, one hundred thirty-one million, three hundred eighty thousand, two hundred sixty-nine".