1913316385 has 4 divisors (see below), whose sum is σ = 2295979668. Its totient is φ = 1530653104.

The previous prime is 1913316371. The next prime is 1913316401. The reversal of 1913316385 is 5836133191.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1210483264 + 702833121 = 34792^2 + 26511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1913316385 - 2¹³ = 1913308193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191331634 + ... + 191331643.

It is an arithmetic number, because the mean of its divisors is an integer number (573994917).

Almost surely, 2^1913316385 is an apocalyptic number.

It is an amenable number.

1913316385 is a deficient number, since it is larger than the sum of its proper divisors (382663283).

1913316385 is an equidigital number, since it uses as much as digits as its factorization.

1913316385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382663282.

The product of its digits is 58320, while the sum is 40.

The square root of 1913316385 is about 43741.4721402927. The cubic root of 1913316385 is about 1241.4491350125.

The spelling of 1913316385 in words is "one billion, nine hundred thirteen million, three hundred sixteen thousand, three hundred eighty-five".