10203391 has 8 divisors (see below), whose sum is σ = 11173968. Its totient is φ = 9240000.

The previous prime is 10203377. The next prime is 10203397. The reversal of 10203391 is 19330201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10203391 - 2⁵ = 10203359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10203397) 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, 1441 + ... + 4741.

It is an arithmetic number, because the mean of its divisors is an integer number (1396746).

Almost surely, 2^10203391 is an apocalyptic number.

10203391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10203391 is a deficient number, since it is larger than the sum of its proper divisors (970577).

10203391 is a wasteful number, since it uses less digits than its factorization.

10203391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 10203391 is about 3194.2747220613. The cubic root of 10203391 is about 216.8943187756.

Adding to 10203391 its reverse (19330201), we get a palindrome (29533592).

It can be divided in two parts, 10 and 203391, that added together give a square (203401 = 451²).

The spelling of 10203391 in words is "ten million, two hundred three thousand, three hundred ninety-one".