249223647977 has 2 divisors, whose sum is σ = 249223647978. Its totient is φ = 249223647976.

The previous prime is 249223647961. The next prime is 249223648067. The reversal of 249223647977 is 779746322942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246352402921 + 2871245056 = 496339^2 + 53584^2 .

It is a cyclic number.

It is not a de Polignac number, because 249223647977 - 2⁴ = 249223647961 is a prime.

It is a super-2 number, since 2×249223647977² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (249223547977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124611823988 + 124611823989.

It is an arithmetic number, because the mean of its divisors is an integer number (124611823989).

Almost surely, 2^249223647977 is an apocalyptic number.

It is an amenable number.

249223647977 is a deficient number, since it is larger than the sum of its proper divisors (1).

249223647977 is an equidigital number, since it uses as much as digits as its factorization.

249223647977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64012032, while the sum is 62.

The spelling of 249223647977 in words is "two hundred forty-nine billion, two hundred twenty-three million, six hundred forty-seven thousand, nine hundred seventy-seven".