1385907389 has 4 divisors (see below), whose sum is σ = 1446164256. Its totient is φ = 1325650524.

The previous prime is 1385907353. The next prime is 1385907403. The reversal of 1385907389 is 9837095831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9837095831 = 353 ⋅27867127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1385907389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385907389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385907889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30128399 + ... + 30128444.

It is an arithmetic number, because the mean of its divisors is an integer number (361541064).

Almost surely, 2^1385907389 is an apocalyptic number.

It is an amenable number.

1385907389 is a deficient number, since it is larger than the sum of its proper divisors (60256867).

1385907389 is an equidigital number, since it uses as much as digits as its factorization.

1385907389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60256866.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 1385907389 is about 37227.7771160192. Note that the first 3 decimals coincide. The cubic root of 1385907389 is about 1114.9226458029.

The spelling of 1385907389 in words is "one billion, three hundred eighty-five million, nine hundred seven thousand, three hundred eighty-nine".