1630855913 has 4 divisors (see below), whose sum is σ = 1640861328. Its totient is φ = 1620850500.

The previous prime is 1630855909. The next prime is 1630855927. The reversal of 1630855913 is 3195580361.

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: 3195580361 = 59 ⋅54162379.

It is a cyclic number.

It is not a de Polignac number, because 1630855913 - 2² = 1630855909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630855973) 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, 5002463 + ... + 5002788.

It is an arithmetic number, because the mean of its divisors is an integer number (410215332).

Almost surely, 2^1630855913 is an apocalyptic number.

It is an amenable number.

1630855913 is a deficient number, since it is larger than the sum of its proper divisors (10005415).

1630855913 is a wasteful number, since it uses less digits than its factorization.

1630855913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10005414.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 1630855913 is about 40383.8570842360. The cubic root of 1630855913 is about 1177.0778776700.

The spelling of 1630855913 in words is "one billion, six hundred thirty million, eight hundred fifty-five thousand, nine hundred thirteen".