1948891 has 4 divisors (see below), whose sum is σ = 2227312. Its totient is φ = 1670472.

The previous prime is 1948883. The next prime is 1948907. The reversal of 1948891 is 1988491.

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

It is a cyclic number.

It is not a de Polignac number, because 1948891 - 2³ = 1948883 is a prime.

It is a super-2 number, since 2×1948891² = 7596352259762, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1948801) 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, 139200 + ... + 139213.

It is an arithmetic number, because the mean of its divisors is an integer number (556828).

2^1948891 is an apocalyptic number.

1948891 is a deficient number, since it is larger than the sum of its proper divisors (278421).

1948891 is an equidigital number, since it uses as much as digits as its factorization.

1948891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278420.

The product of its digits is 20736, while the sum is 40.

The square root of 1948891 is about 1396.0268622057. The cubic root of 1948891 is about 124.9096093186.

The spelling of 1948891 in words is "one million, nine hundred forty-eight thousand, eight hundred ninety-one".