387238613 has 2 divisors, whose sum is σ = 387238614. Its totient is φ = 387238612.

The previous prime is 387238609. The next prime is 387238651. The reversal of 387238613 is 316832783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382671844 + 4566769 = 19562^2 + 2137^2 .

It is a cyclic number.

It is not a de Polignac number, because 387238613 - 2² = 387238609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387234613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193619306 + 193619307.

It is an arithmetic number, because the mean of its divisors is an integer number (193619307).

Almost surely, 2^387238613 is an apocalyptic number.

It is an amenable number.

387238613 is a deficient number, since it is larger than the sum of its proper divisors (1).

387238613 is an equidigital number, since it uses as much as digits as its factorization.

387238613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 387238613 is about 19678.3793285931. The cubic root of 387238613 is about 728.8859048836.

The spelling of 387238613 in words is "three hundred eighty-seven million, two hundred thirty-eight thousand, six hundred thirteen".