1913398 has 4 divisors (see below), whose sum is σ = 2870100. Its totient is φ = 956698.

The previous prime is 1913389. The next prime is 1913407. The reversal of 1913398 is 8933191.

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

It is an interprime number because it is at equal distance from previous prime (1913389) and next prime (1913407).

It is a super-2 number, since 2×1913398² = 7322183812808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478348 + ... + 478351.

It is an arithmetic number, because the mean of its divisors is an integer number (717525).

2^1913398 is an apocalyptic number.

1913398 is a deficient number, since it is larger than the sum of its proper divisors (956702).

1913398 is an equidigital number, since it uses as much as digits as its factorization.

1913398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956701.

The product of its digits is 5832, while the sum is 34.

The square root of 1913398 is about 1383.2563030762. The cubic root of 1913398 is about 124.1466786638.

The spelling of 1913398 in words is "one million, nine hundred thirteen thousand, three hundred ninety-eight".