385249913 has 2 divisors, whose sum is σ = 385249914. Its totient is φ = 385249912.

The previous prime is 385249901. The next prime is 385249967. The reversal of 385249913 is 319942583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384630544 + 619369 = 19612^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 385249913 - 2¹⁸ = 384987769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (385249013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192624956 + 192624957.

It is an arithmetic number, because the mean of its divisors is an integer number (192624957).

Almost surely, 2^385249913 is an apocalyptic number.

It is an amenable number.

385249913 is a deficient number, since it is larger than the sum of its proper divisors (1).

385249913 is an equidigital number, since it uses as much as digits as its factorization.

385249913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 385249913 is about 19627.7842101446. The cubic root of 385249913 is about 727.6360089432.

The spelling of 385249913 in words is "three hundred eighty-five million, two hundred forty-nine thousand, nine hundred thirteen".