9401389 has 4 divisors (see below), whose sum is σ = 9413820. Its totient is φ = 9388960.

The previous prime is 9401377. The next prime is 9401419. The reversal of 9401389 is 9831049.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9831049 = 17 ⋅578297.

It can be written as a sum of positive squares in 2 ways, for example, as 4338889 + 5062500 = 2083^2 + 2250^2 .

It is a cyclic number.

It is not a de Polignac number, because 9401389 - 2¹⁵ = 9368621 is a prime.

It is a super-2 number, since 2×9401389² = 176772230258642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9401309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5002 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (2353455).

Almost surely, 2^9401389 is an apocalyptic number.

It is an amenable number.

9401389 is a deficient number, since it is larger than the sum of its proper divisors (12431).

9401389 is a wasteful number, since it uses less digits than its factorization.

9401389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12430.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 9401389 is about 3066.1684559071. The cubic root of 9401389 is about 211.0558240470.

The spelling of 9401389 in words is "nine million, four hundred one thousand, three hundred eighty-nine".