1913143 has 8 divisors (see below), whose sum is σ = 1974080. Its totient is φ = 1853280.

The previous prime is 1913123. The next prime is 1913147. The reversal of 1913143 is 3413191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1913143 - 2¹³ = 1904951 is a prime.

It is a super-2 number, since 2×1913143² = 7320232276898, which contains 22 as substring.

It is a Duffinian number.

1913143 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4621 + ... + 5017.

It is an arithmetic number, because the mean of its divisors is an integer number (246760).

2^1913143 is an apocalyptic number.

1913143 is a deficient number, since it is larger than the sum of its proper divisors (60937).

1913143 is an equidigital number, since it uses as much as digits as its factorization.

1913143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537.

The product of its digits is 324, while the sum is 22.

The square root of 1913143 is about 1383.1641261976. The cubic root of 1913143 is about 124.1411633781.

The spelling of 1913143 in words is "one million, nine hundred thirteen thousand, one hundred forty-three".