10690621 has 2 divisors, whose sum is σ = 10690622. Its totient is φ = 10690620.

The previous prime is 10690619. The next prime is 10690639. The reversal of 10690621 is 12609601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7901721 + 2788900 = 2811^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 10690621 - 2¹ = 10690619 is a prime.

It is a super-2 number, since 2×10690621² = 228578754731282, which contains 22 as substring.

Together with 10690619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10600621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5345310 + 5345311.

It is an arithmetic number, because the mean of its divisors is an integer number (5345311).

Almost surely, 2^10690621 is an apocalyptic number.

It is an amenable number.

10690621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10690621 is an equidigital number, since it uses as much as digits as its factorization.

10690621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 10690621 is about 3269.6515104824. The cubic root of 10690621 is about 220.2931422826.

It can be divided in two parts, 10690 and 621, that added together give a palindrome (11311).

The spelling of 10690621 in words is "ten million, six hundred ninety thousand, six hundred twenty-one".