513239983 has 2 divisors, whose sum is σ = 513239984. Its totient is φ = 513239982.

The previous prime is 513239977. The next prime is 513240001. The reversal of 513239983 is 389932315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513239983 - 2²¹ = 511142831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513239933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256619991 + 256619992.

It is an arithmetic number, because the mean of its divisors is an integer number (256619992).

Almost surely, 2^513239983 is an apocalyptic number.

513239983 is a deficient number, since it is larger than the sum of its proper divisors (1).

513239983 is an equidigital number, since it uses as much as digits as its factorization.

513239983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 43.

The square root of 513239983 is about 22654.8004405247. The cubic root of 513239983 is about 800.6453038179.

The spelling of 513239983 in words is "five hundred thirteen million, two hundred thirty-nine thousand, nine hundred eighty-three".