1067720971 has 2 divisors, whose sum is σ = 1067720972. Its totient is φ = 1067720970.

The previous prime is 1067720963. The next prime is 1067720977. The reversal of 1067720971 is 1790277601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1067720971 - 2³ = 1067720963 is a prime.

It is a super-2 number, since 2×1067720971² = 2280056143826365682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1067720977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533860485 + 533860486.

It is an arithmetic number, because the mean of its divisors is an integer number (533860486).

Almost surely, 2^1067720971 is an apocalyptic number.

1067720971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1067720971 is an equidigital number, since it uses as much as digits as its factorization.

1067720971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 40.

The square root of 1067720971 is about 32675.9999234912. Note that the first 4 decimals coincide. The cubic root of 1067720971 is about 1022.0824337392.

The spelling of 1067720971 in words is "one billion, sixty-seven million, seven hundred twenty thousand, nine hundred seventy-one".