10699721 has 2 divisors, whose sum is σ = 10699722. Its totient is φ = 10699720.

The previous prime is 10699673. The next prime is 10699723. The reversal of 10699721 is 12799601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9853321 + 846400 = 3139^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 10699721 - 2⁶ = 10699657 is a prime.

It is a super-2 number, since 2×10699721² = 228968058955682, which contains 22 as substring.

Together with 10699723, 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 (10699723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5349860 + 5349861.

It is an arithmetic number, because the mean of its divisors is an integer number (5349861).

Almost surely, 2^10699721 is an apocalyptic number.

It is an amenable number.

10699721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10699721 is an equidigital number, since it uses as much as digits as its factorization.

10699721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 10699721 is about 3271.0428000868. The cubic root of 10699721 is about 220.3556300483.

The spelling of 10699721 in words is "ten million, six hundred ninety-nine thousand, seven hundred twenty-one".