10203491 has 2 divisors, whose sum is σ = 10203492. Its totient is φ = 10203490.

The previous prime is 10203469. The next prime is 10203493. The reversal of 10203491 is 19430201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10203491 is a prime.

It is a super-2 number, since 2×10203491² = 208222457174162, which contains 22 as substring.

Together with 10203493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10203493) 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 as a sum of consecutive naturals, namely, 5101745 + 5101746.

It is an arithmetic number, because the mean of its divisors is an integer number (5101746).

Almost surely, 2^10203491 is an apocalyptic number.

10203491 is a deficient number, since it is larger than the sum of its proper divisors (1).

10203491 is an equidigital number, since it uses as much as digits as its factorization.

10203491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 10203491 is about 3194.2903750285. The cubic root of 10203491 is about 216.8950273427.

Adding to 10203491 its reverse (19430201), we get a palindrome (29633692).

The spelling of 10203491 in words is "ten million, two hundred three thousand, four hundred ninety-one".