813385415 has 4 divisors (see below), whose sum is σ = 976062504. Its totient is φ = 650708328.

The previous prime is 813385411. The next prime is 813385423. The reversal of 813385415 is 514583318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 813385415 - 2² = 813385411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813385411) 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, 81338537 + ... + 81338546.

It is an arithmetic number, because the mean of its divisors is an integer number (244015626).

Almost surely, 2^813385415 is an apocalyptic number.

813385415 is a deficient number, since it is larger than the sum of its proper divisors (162677089).

813385415 is a wasteful number, since it uses less digits than its factorization.

813385415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162677088.

The product of its digits is 57600, while the sum is 38.

The square root of 813385415 is about 28519.9126050554. The cubic root of 813385415 is about 933.4666221915.

The spelling of 813385415 in words is "eight hundred thirteen million, three hundred eighty-five thousand, four hundred fifteen".