1901389 has 8 divisors (see below), whose sum is σ = 2188800. Its totient is φ = 1617936.

The previous prime is 1901377. The next prime is 1901407. The reversal of 1901389 is 9831091.

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 1901389 - 2⁵ = 1901357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1901389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901329) 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, 132 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (273600).

2^1901389 is an apocalyptic number.

It is an amenable number.

1901389 is a deficient number, since it is larger than the sum of its proper divisors (287411).

1901389 is a wasteful number, since it uses less digits than its factorization.

1901389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1901389 is about 1378.9086264144. The cubic root of 1901389 is about 123.8864074195.

The spelling of 1901389 in words is "one million, nine hundred one thousand, three hundred eighty-nine".