106303721 has 2 divisors, whose sum is σ = 106303722. Its totient is φ = 106303720.

The previous prime is 106303709. The next prime is 106303739. The reversal of 106303721 is 127303601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87684496 + 18619225 = 9364^2 + 4315^2 .

It is a cyclic number.

It is not a de Polignac number, because 106303721 - 2¹⁰ = 106302697 is a prime.

It is a super-2 number, since 2×106303721² = 22600962196891682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (106303321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53151860 + 53151861.

It is an arithmetic number, because the mean of its divisors is an integer number (53151861).

Almost surely, 2^106303721 is an apocalyptic number.

It is an amenable number.

106303721 is a deficient number, since it is larger than the sum of its proper divisors (1).

106303721 is an equidigital number, since it uses as much as digits as its factorization.

106303721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 106303721 is about 10310.3695860042. The cubic root of 106303721 is about 473.7139297661.

The spelling of 106303721 in words is "one hundred six million, three hundred three thousand, seven hundred twenty-one".