10209931 has 2 divisors, whose sum is σ = 10209932. Its totient is φ = 10209930.

The previous prime is 10209883. The next prime is 10209961. The reversal of 10209931 is 13990201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10209931 - 2⁷ = 10209803 is a prime.

It is a super-2 number, since 2×10209931² = 208485382049522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10209896 and 10209905.

It is not a weakly prime, because it can be changed into another prime (10209961) 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, 5104965 + 5104966.

It is an arithmetic number, because the mean of its divisors is an integer number (5104966).

Almost surely, 2^10209931 is an apocalyptic number.

10209931 is a deficient number, since it is larger than the sum of its proper divisors (1).

10209931 is an equidigital number, since it uses as much as digits as its factorization.

10209931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 10209931 is about 3195.2982646382. The cubic root of 10209931 is about 216.9406493170.

The spelling of 10209931 in words is "ten million, two hundred nine thousand, nine hundred thirty-one".