247755983 has 2 divisors, whose sum is σ = 247755984. Its totient is φ = 247755982.

The previous prime is 247755979. The next prime is 247756001. The reversal of 247755983 is 389557742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247755983 - 2² = 247755979 is a prime.

It is a super-2 number, since 2×247755983² = 122766054224592578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247755923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123877991 + 123877992.

It is an arithmetic number, because the mean of its divisors is an integer number (123877992).

Almost surely, 2^247755983 is an apocalyptic number.

247755983 is a deficient number, since it is larger than the sum of its proper divisors (1).

247755983 is an equidigital number, since it uses as much as digits as its factorization.

247755983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 50.

The square root of 247755983 is about 15740.2662938084. The cubic root of 247755983 is about 628.0700009532.

The spelling of 247755983 in words is "two hundred forty-seven million, seven hundred fifty-five thousand, nine hundred eighty-three".