1913263 has 4 divisors (see below), whose sum is σ = 2087208. Its totient is φ = 1739320.

The previous prime is 1913251. The next prime is 1913269. The reversal of 1913263 is 3623191.

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

It is a de Polignac number, because none of the positive numbers 2^k-1913263 is a prime.

It is a Duffinian number.

1913263 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86956 + ... + 86977.

It is an arithmetic number, because the mean of its divisors is an integer number (521802).

2^1913263 is an apocalyptic number.

1913263 is a deficient number, since it is larger than the sum of its proper divisors (173945).

1913263 is a wasteful number, since it uses less digits than its factorization.

1913263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173944.

The product of its digits is 972, while the sum is 25.

The square root of 1913263 is about 1383.2075043174. The cubic root of 1913263 is about 124.1437588677.

The spelling of 1913263 in words is "one million, nine hundred thirteen thousand, two hundred sixty-three".