1071397651 has 2 divisors, whose sum is σ = 1071397652. Its totient is φ = 1071397650.

The previous prime is 1071397633. The next prime is 1071397693. The reversal of 1071397651 is 1567931701.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1071397651 - 2¹⁷ = 1071266579 is a prime.

It is a super-2 number, since 2×1071397651² = 2295785853136635602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1071397601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535698825 + 535698826.

It is an arithmetic number, because the mean of its divisors is an integer number (535698826).

Almost surely, 2^1071397651 is an apocalyptic number.

1071397651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071397651 is an equidigital number, since it uses as much as digits as its factorization.

1071397651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 1071397651 is about 32732.2112146430. The cubic root of 1071397651 is about 1023.2542645167.

The spelling of 1071397651 in words is "one billion, seventy-one million, three hundred ninety-seven thousand, six hundred fifty-one".