10612991 has 2 divisors, whose sum is σ = 10612992. Its totient is φ = 10612990.

The previous prime is 10612957. The next prime is 10612997. The reversal of 10612991 is 19921601.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10612991 is a prime.

It is a super-2 number, since 2×10612991² = 225271155932162, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10612997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5306495 + 5306496.

It is an arithmetic number, because the mean of its divisors is an integer number (5306496).

Almost surely, 2^10612991 is an apocalyptic number.

10612991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10612991 is an equidigital number, since it uses as much as digits as its factorization.

10612991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 10612991 is about 3257.7585852853. The cubic root of 10612991 is about 219.7586264578.

The spelling of 10612991 in words is "ten million, six hundred twelve thousand, nine hundred ninety-one".