1913722 has 4 divisors (see below), whose sum is σ = 2870586. Its totient is φ = 956860.

The previous prime is 1913719. The next prime is 1913749. The reversal of 1913722 is 2273191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2273191 = 461 ⋅4931.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 6561 = 1381^2 + 81^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 478429 + ... + 478432.

2^1913722 is an apocalyptic number.

1913722 is a deficient number, since it is larger than the sum of its proper divisors (956864).

1913722 is an equidigital number, since it uses as much as digits as its factorization.

1913722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956863.

The product of its digits is 756, while the sum is 25.

The square root of 1913722 is about 1383.3734130740. The cubic root of 1913722 is about 124.1536856140.

The spelling of 1913722 in words is "one million, nine hundred thirteen thousand, seven hundred twenty-two".