1901873 has 4 divisors (see below), whose sum is σ = 1904640. Its totient is φ = 1899108.

The previous prime is 1901857. The next prime is 1901891. The reversal of 1901873 is 3781091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3781091 = 1063 ⋅3557.

It is a cyclic number.

It is not a de Polignac number, because 1901873 - 2⁴ = 1901857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1901803) 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, 536 + ... + 2022.

It is an arithmetic number, because the mean of its divisors is an integer number (476160).

2^1901873 is an apocalyptic number.

It is an amenable number.

1901873 is a deficient number, since it is larger than the sum of its proper divisors (2767).

1901873 is a wasteful number, since it uses less digits than its factorization.

1901873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1901873 is about 1379.0841163613. The cubic root of 1901873 is about 123.8969183204.

It can be divided in two parts, 19018 and 73, that added together give a palindrome (19091).

The spelling of 1901873 in words is "one million, nine hundred one thousand, eight hundred seventy-three".