1070313721 has 2 divisors, whose sum is σ = 1070313722. Its totient is φ = 1070313720.

The previous prime is 1070313703. The next prime is 1070313779. The reversal of 1070313721 is 1273130701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1060479225 + 9834496 = 32565^2 + 3136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1070313721 - 2⁷ = 1070313593 is a prime.

It is a super-2 number, since 2×1070313721² = 2291142922721731682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1070313791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535156860 + 535156861.

It is an arithmetic number, because the mean of its divisors is an integer number (535156861).

Almost surely, 2^1070313721 is an apocalyptic number.

It is an amenable number.

1070313721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1070313721 is an equidigital number, since it uses as much as digits as its factorization.

1070313721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 1070313721 is about 32715.6494815555. The cubic root of 1070313721 is about 1022.9090735907.

The spelling of 1070313721 in words is "one billion, seventy million, three hundred thirteen thousand, seven hundred twenty-one".