1945389 has 8 divisors (see below), whose sum is σ = 2602080. Its totient is φ = 1292816.

The previous prime is 1945381. The next prime is 1945393. The reversal of 1945389 is 9835491.

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 1945389 - 2³ = 1945381 is a prime.

It is a super-2 number, since 2×1945389² = 7569076722642, which contains 22 as substring.

1945389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945381) 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, 334 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (325260).

2^1945389 is an apocalyptic number.

It is an amenable number.

1945389 is a deficient number, since it is larger than the sum of its proper divisors (656691).

1945389 is a wasteful number, since it uses less digits than its factorization.

1945389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059.

The product of its digits is 38880, while the sum is 39.

The square root of 1945389 is about 1394.7720243825. The cubic root of 1945389 is about 124.8347469611.

The spelling of 1945389 in words is "one million, nine hundred forty-five thousand, three hundred eighty-nine".